Question

A father is nine times as old as his son and the mother is eight times as old as the son. The sum of father's and mother's age is 51 years. What is the age of the son?
1. 7 years
2. 5 years
3. 4 years
4. 3 years

Answer 1

Correct Answer - Option 4 : 3 years

Let the age of the son be x.

Age of the father is 9x.

Age of mother is 8x.

Sum of father's and mother's age is 51 years.

9x + 8x = 51 years

17x = 51 years

x = 3 years

Age of the son is x i.e. 3 years.

Hence, 3 years is correct.