Multiple choice

Average of the present ages of husband, wife and their child is 38 years. At the time of birth of the child, average age of the husband and wife was 39 years. Find the present age of the child.

  1. 10

  2. 14

  3. 15

  4. 20

  5. 12
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E Correct answer
Explanation

Total age of all three = 38×3 = 114 years. When child was born (c years ago), average age of husband and wife was 39, so their combined age was 78 years. After c years, their combined age became 78 + 2c (both aged c years). Now: (78+2c) + c = 114, which gives 3c = 36, so c = 12 years.

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