### The average of 50 numbers is 38. If the numbers 45 and 55 are discarded, then the average of the remaining numbers is-

A. 36.5 B. 37 C. 37.5 D. 37.52 Answer: Option C

### Solution(By Apex Team)

$\begin{array}{l}\text{Sum of 50 numbers }\\ \text{= 38 × 50 = 1900}\\ \text{Sum of remaining 48 numbers}\\ \text{= 1900 – (45 + 55)}\\ \text{= 1800}\\ \text{∴ Required average}\\ =\Large\frac{1800}{48}\\ =37.5\end{array}$

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