the average age of all the members of a family is 25 yr. the average age of ma

Question

the average age of all the members of a family is 25 yr. the average age of males is 30 yr while the average age of females is 20 yr. if the number of females in the family is 15, then find out the nu

Options:

A . 5

B . 10

C . 15

D . 20

Answer: Option C
Explanation :

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