Question

The average age of a couple at the time of marriage was 20 years. After 8 years of marriage they have a baby of 4 years old. Calculate the average age of the family when the baby was born

Answer 1

Average age of couple is $20years$

$\Rightarrow$ Total age of couple $=2\times 20=40years$

After $8$ years they have baby of $4years$ old. Means they have baby after $4$ years of there marriage.

$\Rightarrow$ Total age of family when baby was born $=40+4+4+0=48years$

$\therefore$ The average age of the family when baby was born $=\frac{48}{3}=16years$