### 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 the average age of the family?

**A.** $28 \frac{4}{7} \text { years }$

**B.** $31 \frac{5}{7} \text { years }$

**C.** $32 \frac{1}{7} \text { years }$

**D.** None of these

## Show Answer

###
Answer-B

Solution-

__Solution(By Apex Team)__

$\begin{array}{l}\text{ Required average }\\
=\Large\frac{67\times2+35\times2+6\times3}{2+2+3}\\
=\Large\frac{134+70+18}{7}\\
=\Large\frac{222}{7}\\
=31\Large\frac{5}{7}\small\text{ years }\end{array}$