A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 80 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of family?
Choose the correct choice.
A) 3/7years	B) B)31	C) C)30	D) D)33	E) E)35
Required average   = (80 x 2 + 35 x 2 + 6 x 3 )/(2 + 2 + 3)   = (160 + 70 + 18)/7   = 248/7   = 35 3/7years.   3/7yearsnswer is 3/7years
<result>A</result>
A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 80 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of family?