Multiple choice

The present ages of A, B and C are in the ratio A : B : C = 4 : 7 : 9. Seven years ago, the sum of their ages was 59. Find their present ages.

  1. 16, 28, 36

  2. 36, 28, 16

  3. 9, 21, 29

  4. 29, 21, 9

  5. None of these
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A Correct answer
Explanation

Let the ages of A, B, C be 4x, 7x, 9x, respectively.  (4x-7) + (7x-9) + (9x-9) = 59 or 20x = 80 or x = 4 16 : 28 : 36

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