MCQ
The mean of the first $10$ composite numbers is :
- A$12.2$
- B$11.4$
- ✓$11.2$
- D$112$
✓
Answer
Correct option: C.
$11.2$
The first $10$ composite numbers are $\{4, 6, 8, 9, 10, 12, 14, 15, 16, 18\}$
$\therefore\text{Mean}=\frac{\text{sum of first $10$ composite numbers}}{10}$
$=\frac{ 4, 6, 8, 9, 10, 12, 14, 15, 16, 18}{10}$
$=\frac{112}{10}$
$=11.2$
$\therefore\text{Mean}=\frac{\text{sum of first $10$ composite numbers}}{10}$
$=\frac{ 4, 6, 8, 9, 10, 12, 14, 15, 16, 18}{10}$
$=\frac{112}{10}$
$=11.2$
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