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Railways PYQCBT 1 2016

RRB NTPC · Question 83

Two numbers are in ratio 3 : 4. When 3 is subtracted from the numbers, the ratio becomes 2 : 3. Find the sum of the numbers. A. 16 B. 20 C. 21 D. 22

  1. C

  2. B

  3. D

  4. A

Show answer & explanation

Answer: (A) C

Explanation

Let the numbers be 3k and 4k. (3k − 3)/(4k − 3) = 2/3 gives 9k − 9 = 8k − 6, so k = 3. The numbers are 9 and 12, and their sum is 21.