### The average of 6 numbers is 7. The average of three numbers of them is 5. What will be the average of remaining numbers?

A. 15 B. 30 C. 9 D. 42 Answer: Option C

### Solution(By Apex Team)

Average of 6 numbers = 7 Sum of 6 numbers = 6 × 7 = 42 Average of three numbers = 5 Sum of three numbers = 5 × 3 = 15 ∴ Sum of the remaining three numbers = 42 – 15 = 27 ∴ Required average $\begin{array}{l} =\large\frac{27}{3} \\ =9 \end{array}$

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