### The average of 12 numbers is 15 and the average of the first two is 14. What is the average of the rest ?

A. $15 \frac{1}{5}$ B. 14 C. $11 \frac{1}{5}$ D. 15 Answer: Option A

### Solution(By Apex Team)

Average of twelve number = 15 Sum of twelve number = 15 × 12 = 180 Average of first two number = 14 Sum of first two number = 14 × 2 = 28 Sum of first two + Sum of rest = 180 Sum of rest = 180- 28 = 152 $\begin{array}{l}\text{Average of rest}\\ =\Large\frac{152}{10}\\ =15\Large\frac{1}{5}\end{array}$

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