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Data Handling — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSData Handling3 Marks
Question
Number of children in six different classes are given below. Represent the data on a bar graph.
ClassFifthSixthSeventhEighthNinthTenth
Number of children135120951009080
(i) How would you choose a scale?
(ii) Answer the following questions
(a) Which class has the maximum number of children and the minimum?
(b) Find the ratio of students of class sixth to the students of class eighth.
✓

Answer

(i) We start the scale from 0 . The greatest value of data is 135, so end the scale at a value greater than 135 such as 140. Use equal division along axes such as increment of 10 .
Here, we take 1 unit for 10 children.
Image
(ii) (a) From the graph, maximum number of children in class fifth i.e. 135 and minimum number of children in class tenth i.e. 80 .
(b) From the graph,
Number of students in sixth class $=120$
Number of students in eighth class $=100$
$\therefore$ The required ratio
$
\begin{array}{l}
=\frac{\text { Number of students in sixth class }}{\text { Number of students in eighth class }} \\
=\frac{120}{100}=\frac{6}{5} \text { or } 6: 5
\end{array}
$

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