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A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?

A)200/7years
B)222/7years
C)225/7years
D)None of these

Read Solution (Total 1)

Ans: B)222/7 years

Explanation:
Multiply avg age of grand parents, parents and grand childrens with respectively to the no of persons in the family.
i.e,
Total Age of the family => (67*2)+(35*2)+(3*6)=222
Total no of persons in family = 7
Now the avg age of the family = 222/7 years
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