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Railways PYQCBT 1 2016

RRB NTPC · Question 27

The ratio of two positive integers is 3 ∶ 4. Their sum is 70. How much should be added to each integer so that their ratio becomes 5 ∶ 6? A. 10 B. 20 C. 30 D. 40

  1. D

  2. B

  3. C

  4. A

Show answer & explanation

Answer: (B) B

Explanation

The integers are 30 and 40. (30 + x)/(40 + x) = 5/6 gives 180 + 6x = 200 + 5x, so x = 20.