### The average of the first five multiples of 3 is-

A. 3 B. 9 C. 12 D. 15 Answer: Option B

### Solution(By Apex Team)

$\begin{array}{l}\text{ Average }\\ =\Large\frac{3(1+2+3+4+5)}{5}\\ =\Large\frac{45}{5}\\ =9\end{array}$

A. 20
B. 21
C. 28
D. 32

A. 18
B. 20
C. 24
D. 30

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years