1.  The average age of a husband and his wife was 23 years at the time of their marriage. After five years they have a one-year old child. The average age of the family now is :
A. 19 years
B. 23 years
C. 28.5 years
D. 29.3 years

Answer: Option A

Explanation:

Sum of the present ages of husband, wife and child
= (23 x 2 + 5 x 2) + 1
= 57 years.

Required average = (57/3 )

= 19 years.