Multiple choice

The average age of husband and wife was 27 years when they married 4 years ago. The average age of husband, the wife and a new born child is 21 years now. The present age of child is

  1. 4 years

  2. 3 years

  3. 2 years

  4. 1 years
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

4 years ago, H+W = 2×27 = 54. Now, H+W = 54+8 = 62. With child, average is 21, so H+W+C = 3×21 = 63. Child's age = 63-62 = 1 year.

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