Question

A family consists of two grandparents, two 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) 2847,
B) 31577
C) 324
D) 3123​

Answer 1

Answer:

ब 31577 इस answer of this question

Answer 2

Required average =

$( \frac{67×2+35×2+6×3}{2 + 2 + 3} )$

$( \frac{134+70+18}{7})$

$\frac{222}{7}$

$31 \frac{5}{7} \: years$