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Assertion (A) & Reason (B) MCQ

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Question 11 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: If the median of the given data 26, 29, 42, 53, x, x + 2, 70, 75, 82, 93, is 65 then the value of x is 64.
Reason: When the number of observations (n) is odd the median is the value of the $\big(\frac{\text{n}+1}{2}\big)^\text{th}$ observation.
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Assertion is false but reason is true.
Answer
  1. Both assertion and reason are true but reason is not the correct explanation of assertion.
Solution:
Given, number of observation is 10 (even)
Hence, Median $=\frac{\text{x}+(\text{x}+2)}{2}$
$65=\frac{2\text{x}+2}{2}=\text{x}+1$
$65=\text{x}+1$
$\text{x}=64$
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Question 21 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The mode of above data is:
Class interval 3-6 6-9 9-12 12-15 15-18 18-21
Frequency 2 5 21 23 10 12
Reason: The value of variable which occur most often is mode.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Question 31 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: 2, 4, 6 here median is the 4
Reason: 2, 4, 6, 8 here median is the 5
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Question 41 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: 13, 13, 13, 13, 14, 14, 16, 18, 21 here range is 8
Reason: 1, 2, 4, 7 here range is 6
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Question 51 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Mode of given data 110, 120, 130, 120, 110, 140, 130, 120, 140, 120 is 120.
Reason: The observation with maximum frequency is called mode.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 61 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Mean is the number of observations is the sum of the values of all the observations divided by the total number of observations.
Reason: It is denoted by the symbol x
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Question 71 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The pre modal class and the post modal class rectangles have the same height. If the modal class is 40-60, then the mode is 50.
Reason: Mode $=\frac{\text{L}+\text{(fm}-\text{f}_1)}{\text{(2fm}-\text{f}_1-\text{f}_2)}\times\text{h}$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 81 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The median and mode of a frequency distribution are 150 and 154 respectively, then its mean is 148.
Reason: Mean, median and mode of a frequency distribution are related as: mode = (3 median) – (2 mean).
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 91 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The median of the following observation 0, 1, 2, 3, x , x + 2, 8, 9, 11, 12 arranged in ascending order is 63, then the value of x is 62.
Reason: Median of n even observations is $\big(\frac{\text{(n)}}{2}\big)^\text{th}\text{term} + \big(\frac{\frac{\text{n}}{2+1}^\text{th}\text{term}}{2}\big)$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 101 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The mean of x, y, z is y then x + z = 2y
Reason: $\frac{\text{(x+y+z)}}{3}=\text{y},$ hence x + y + z = 3y. x + z = 2y
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 111 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: If the mean of first n natural numbers is $\frac{3\text{n}}{5}$ then the value of n is 5
Reason: Sum of natural numbers=$\frac{\text{n}\text{(n+1)}}{2}$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 121 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Mean of n observations $=\frac{\text{Number of observations}}{\text{Sum of observations}}$
Reason: If the mean of five observations x, x + 2, x + 4, x + 6, x + 8 is 11, then mean of last three observations is 8.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 131 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Mean may or may not be the appropriate measure of central tendency.
Reason: If the number of observations are even then median is $\big(\frac{\text{n}+1}{2}\big)^\text{th}$ term.
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Assertion is false but reason is true.
Answer
  1. Assertion is true but reason is false.
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MCQ 141 Mark
Directions: In the following questions, the Assertions $(A)$ and Reason$(s) (R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Median= $\big(\frac{\text{(n+1)}}{2}\big)^\text{th}$value if $n$ is odd.
Reason: If the number of runs scored by $11$ players of a cricket team of India are $5, 19, 42, 11, 50, 30, 21, 0, 52, 36, 27$ then median is $30$
  • A
    Both Assertion and reason are correct and reason is correct explanation for Assertion.
  • B
    Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  • Assertion is correct but reason is false.
  • D
    Both Assertions and reason are false.
Answer
Correct option: C.
Assertion is correct but reason is false.
Assertion is correct but reason is false.
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Question 151 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The median of the data 13, 15, 16, 17, 19, 20 is $\frac{30}{2}$
Reason: Median $=\frac{(16+17)}{2}=\frac{33}{2}$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 161 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The Mode of data set A = {2, 2, 2, 3, 4, 4, 5, 6, 5, 4, 7, 5, 8} is the example of trimodal set.
Reason: Because all the three values are repeating thrice in the given set. Hence, it is a Trimodal data set.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 171 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The median of 83, 37, 70, 29, 45, 63, 41, 70, 34, 54, is 49.5.
Reason: The median of n odd number of observations is $\Big(\frac{\text{n}+1}{2}\Big)^{\text{th}}$ term.
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Assertion is false but reason is true.
Answer
  1. Both assertion and reason are true but reason is not the correct explanation of assertion.
Solution:
29, 34, 37, 41, 45, 54, 63, 70, 70, 83
Number of terms = 10(even)
For even number of observation we have
$\text{Median}=\frac{\big(\frac{\text{n}}{2}\big)^\text{th}\text{term}+\big(\frac{\text{n}}{2}+1\big)^\text{th}\text{term}}{2}$
$=\frac{5^\text{th}\text{term}+6^\text{th}\text{term}}{2}$
$=\frac{45+54}{2}=\frac{99}{2}=49.5$
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Question 181 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The class width for the grouped frequency distribution of the class intervals 1-20, 21-40, 41-60, is 20.
Reason: Class width is the same as the class size.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 191 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The mode of below data is:
Class interval
3-6
6-9
9-12
12-15
15-18
18-21
21-24
Frequency
2
5
10
23
21
12
3
 Reason: The value of the variable which occurs minimum often is the mode.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 201 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The ratio of the sum of observations and the total number of observations is called mean
Reason: The mean of x + 2, x + 3, x + 4 and x - 2 is $\frac{(4\text{x}+7)}{4}$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 211 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correctalternative from the following:
Assertion: If the value of mode and mean is 60 and 66 then the value of median is 64.
Reason: Median = (mode + 2 mean)
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 221 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The class mark of the class interval 90 - 120 is 105.
Reason: Class mark $=\frac{(\text{upper limit + lower limit)}}{2}$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 231 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Median is the middle observation of an ordered set.
Reason: 1, 2, 4, 5, 5, 6, 8 here middle observation is 5, so the median is 5
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 241 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Sucrose is called an invert sugar.
Reason: On hydrolysis, sucrose bring the change in the sign of rotation from dextro (+) to laevo(–).
  1. If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  2. If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  3. If the Assertion is correct but Reason is incorrect.
  4. If both the Assertion and Reason are incorrect.
Answer
  1. If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
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Question 251 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The median of 83, 37, 70, 29, 45, 63, 41, 70, 34, 54, is 49.5.
Reason: The median of n odd number of observations is $\big(\frac{\text{(n+1)}}{2}\big)^\text{th}$term.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Question 261 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Mean of first ten odd natural number is 10.
Reason: Mean of n number $=\frac{\text{ sum of number}}{\text{n}}$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 271 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The mean is one of the numbers in data.
Reason: The mean is one of the numbers in data.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertions and reason are false.
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Question 281 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: If the mean of frequency distribution is 7.5 and $\sum\text{f}_\text{i}\text{x}_\text{i}=120+3\text{k},\sum\text{f}_\text{i}=30$ then k is equal to 35.
Reason: X mean $=\frac{\sum\text{f}_\text{i}\text{x}_\text{i}}{\sum\text{f}_\text{i}}$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 291 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: 15 is  the mode of 4, 4, 4, 9, 15, 15, 15, 27, 37, 48 data set.
Reason: Mode is defined as the value that has a higher frequency in a given set of values.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 301 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The range of the first 6 multiples of 6 is 9.
Reason: Range = Maximum value - Minimum value.
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Assertion is false but reason is true.
Answer
  1. Assertion is false but reason is true.
Solution:
First 6 multiples of 6 = 6, 12, 18, 24, 30, 36
Range = 36 - 6 = 30
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Question 311 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Class mark of a class is obtained by using$\frac{1}{2}$(upper limit - lower limit)
Reason: Class mark is the mean of the upper limit and lower limit of the class.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 321 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion:  Range = Maximum value  –  Minimum value.
Reason: The range of the first 6 multiples of 6 is 9.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 331 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The mean of the data: 4, 10, 5, 9, 12 is 8.
Reason: Mean $=\frac{(4+10+5+9+12)}{5}=\frac{40}{5}=8$
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 341 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The mode of the given data: 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9, 9 is 6.
Reason: The value which appears very frequently in a data is called median.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertions and reason are false.
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Question 351 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Set of data with one Mode is known as a Unimodal Mode.
Reason: The Mode of data set A = {14, 15, 16, 17, 15, 18, 15, 19} is 15 as there is only one value repeating itself. Hence, it is a Unimodal data set.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 361 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: If the difference between the mode and median is 2, then the difference between the median and mean is 1
Reason: Mean - Mode = 3 [ Mean - Median ]
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 371 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The median of the following observation 0, 1, 2, 3, x , x + 2, 8, 9, 11, 12 arranged in ascending order is 63, then the value of x is 62.
Reason: Median of n even observations is $\frac{\big(\frac{\text{n}}{2}\big)^{\text{th}}\text{term}+\Big(\frac{\text{n}}{2}+1\Big)^{\text{th}}\text{term}}{2}$
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Assertion is false but reason is true.
Answer
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
Solution:
Number of terms = 10(even)
$\text{median}=\frac{\big(\frac{\text{n}}{2}\big)^{\text{th}}\text{term}+\Big(\frac{\text{n}}{2}+1\Big)^{\text{th}}\text{term}}{2}$
$\frac{5^\text{th}\text{term}+6^\text{th}\text{term}}{2}$
$=\frac{\text{x}+\text{x}+2}{2}=63$
$\text{2}\text{x}+2=126$
$\text{x}=62$
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Question 381 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: A set of data with two Modes is known as a Bimodal Mode.
Reason: The Mode of data set A = {8, 13, 13, 14, 15, 17, 17, 19} is the example of bimodal mode.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 391 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Class mark is defined as the mean of the lower limit and upper limit.
Reason: The mid point of a class interval is called the lower limit.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 401 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The following is the data of wages per day: 8, 4, 7, 5, 8, 8, 5, 7, 9, 5, 7, 9, 10, 8, then the mode of the data is 8.
Reason: Mode = Highest observation – lowest observation.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 411 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The class intervals 10-20, 20-30, 20 is included in which interval 20-30.
Reason: The number is always included in the lower limit of the class interval.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 421 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: If the median of the given data 26, 29, 42, 53, x, x + 2, 70, 75, 82, 93, is 65 then the value of x is 64.
Reason: When the number of observations (n) is odd the median is the value of the$\Big(\frac{(\text{n}+1)}{2}\Big)$ observation.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Question 431 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Median of the given data 34, 31, 42, 43, 46, 25, 39, 45, 32, is 39.
Reason: When the number of observations (n) is even arrange the numbers in the ascending order then the median is the mean of the and |n + 1|
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Question 441 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The following is the data of wages per day: 8, 4, 7, 5, 8, 8, 5, 7, 9, 5, 7, 9, 10, 8, then the mode of the data is 8.
Reason: Mode = Highest observation - lowest observation.
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Assertion is false but reason is true.
Answer
  1. Assertion is true but reason is false.
Solution:
8 is the most frequent value.
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Question 451 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The difference between the maximum and minimum values of a variable is called its range.
Reason: The number of times a variate (observation) occurs in a given data is called range.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 461 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: According to statistics more female children are born each year than male children in India.
Reason: In India the death rate of a male child is higher than that of the female child.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 471 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The difference between the maximum and minimum values of the given observation is called range.
Reason: The maximum value is 120 if the range is 38 and the minimum value is 82.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
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Question 481 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The difference between the maximum and minimum values of a variable is called its range.
Reason: The number of times a variate (observation) occurs in a given data is called range.
  1. Both assertion and reason are true and reason is the correct enatixplaon of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Assertion is false but reason is true.
Answer
  1. Assertion is true but reason is false.
Solution:
The number of times a variate (observation) occurs in a given data is called frequency of that variate.
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Question 491 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The measures of central tendency lie between the maximum and minimum values of the data.
Reason: The measures of central tendency may not lie between the maximum and minimum values of data.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Assertion is correct but reason is false.
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Question 501 Mark
Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The median of the data: 4, 6, 8, 9, 11 is 8
Reason: The median of the data: 155, 160, 145, 149, 150, 147, 152, 144, 148 is 149.
  1. Both Assertion and reason are correct and reason is correct explanation for Assertion.
  2. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
  3. Assertion is correct but reason is false.
  4. Both Assertions and reason are false.
Answer
  1. Both Assertion and reason are correct but reason is not correct explanation for Assertion.
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Assertion (A) & Reason (B) MCQ - MATHS STD 9 Questions - Vidyadip