A family consists of two grandparents, two parents and 6 grandchildren. The average age of the grandparents is 60 years, that of the parents is 30 years and that of the grandchildren is 5 years. What is the average age of family?	Choose the most appropriate option.
A) 5/7years	B) B)21	C) C)30	D) D)33	E) E)35
Required average   = (60 x 2 + 30 x 2 + 5 x 6 )/(2 + 2 + 6)   = (120 + 60 + 30)/10   = 210/10= 
<gadget id="calculator">210/10</gadget>
<output>21</output>
21 years.   Answer is 21
<result>B</result>
A family consists of two grandparents, two parents and 6 grandchildren. The average age of the grandparents is 60 years, that of the parents is 30 years and that of the grandchildren is 5 years. What is the average age of family?