### The average weight of 16 boys in a class is 50.25 kgs and that of the remaining 8 boys is 45.15 kgs. Find the average weight of all the boys in the class.

A. 47.55 kgs B. 48 kgs C. 48.55 kgs D. 49.25 kgs Answer: Option C

### Solution(By Apex Team)

\begin{aligned}&\text{ Required mean }\\ &=\left(\frac{50.25\times16+45.15\times8}{16+8}\right)\\ &=\left(\frac{804+361.20}{24}\right)\\ &=\frac{1165.20}{24}\\ &=48.55\end{aligned}

## Related Questions On Average

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

### If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is.

A. a = b = c
B. a : b : c = 3 : 2 : 4
C. 4a = 5b = c
D. a + b + c = 12