If the average of m numbers is n2 and that of n numbers is m2 , then the average of (m + n) numbers is?
- m - n
- m + n
- m/n
- mn
Explanation
Sum of m numbers = mn^2
Sum of n numbers = nm^2
∴ Average of (m + n) numbers
= mn(m+n)/(m+n)
= mn
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