a family consists of grandparents, parents and three grandchildren. the averag

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a family consists of grandparents, 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 t

Options:

A . 31( 5/7)

B . 32 (6/7)

C . 34(4/7)

D . 35(4/9)

Answer: Option A
Explanation :

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