Question

The average age of a husband and his wife at the time of their marriage was 25 years. After 7 years, the average age of the husband, wife and his son is 22 years. What is the age of the son at that time?

• A. 5
• B. 4
• C. 3
• D. 2

Answer 1

Answer:

D. 2

Solution: Given: The average age of a husband and his wife at the time of their marriage was 25 years. After 7 years, the average age of the husband, wife and son is 22 years Formula Used: average = sum of terms/number of terms Calculation: Let the present age of son be 'x' years ⇒ the sum of age of husband and wife 7 years ago = 25 × 2 = 50 years ⇒ sum of age of husband and wife at present time = 50 + 7 + 7 = 64 years ⇒ 22 × 3 = 64 + x ⇒ x = 2 years ∴ The required present age of son = 2 years