The average age of husband, wife and child 7 years ago was 42 years and that of wife and child 9 years ago was 36 years. The present age of the husband is:
Answer & explanation
Correct answer: option 4
ATQ
Sum of age of husband, wife and child, 7 years ago = 42 × 3 = 126
Sum of their present age = 126 + 21 = 147
Sum of age of wife and child, 9 years ago = 36 × 2 = 72
Sum of present age of wife and child = 72 + 18 = 90
Present age of husband = 147 - 90 = 57 years