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 :
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 57
| Application |
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Suppose the present ages of husband, wife and child are h, w and ch respectively: [(h - 7) + (w - 7) + (ch - 7)]/3 = 42 ⇒ h + w + ch = 126 + 21 ⇒ h + w + ch = 147 .....i) & [(w - 9) + (ch - 9)] = 36 ⇒ w + ch = 72 + 18 ⇒ w + ch = 90 ......ii) |
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Now, Put the value of eq(i) in eq(ii) So, h + 90 = 147 ⇒ h = 147 - 90 ⇒ h = 57 |