A family consists of paternal grandparents, parents and three grandchildren. The average age of the grandparents is 70 years, that of the parents is 40 years and that of the grandchildren is 10 years. What is the average age of the family?

A family consists of paternal grandparents, parents and three grandchi

1.	A family consists of paternal grandparents, parents and three grandchildren. The average age of the grandparents is 70 years, that of the parents is 40 years and that of the grandchildren is 10 years. What is the average age of the family?
A.	34 4 years 7
B.	35 5 years 7
C.	32 1 years 7
D.	37 1 years 2
E.	None of these
Answer» C. 32 1 years 7

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A family consists of paternal grandparents, parents and three grandchildren. The average age of the grandparents is 70 years, that of the parents is 40 years and that of the grandchildren is 10 years. What is the average age of the family?

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