If the average of m numbers is n² and that of n numbers is m² , then the average of (m + n) numbers is-

A. m - n

B. mn

C. m + n

D. $$\frac{m}{n}$$

Answer: Option B

Solution(By Examveda Team)

Sum of m numbers = mn²
Sum of n numbers = nm²
∴ Average of (m + n) numbers
= $$\frac{mn(m + n)}{(m + n)}$$
= mn