Railways PYQCBT 1 2020

RRB NTPC · Question 13

The numerator of a fraction is 2 less than the denominator. If the numerator is multiplied by 2 and the denominator is multiplied by 3, then the fraction becomes 2/9 The fraction is:

  1. 3/5

  2. 7/9

  3. 1/3

  4. 5/7

Show answer & explanation

Answer: (C) 1/3

Explanation

Let the fraction be x/(x + 2). Then 2x/[3(x + 2)] = 2/9, so 18x = 6x + 12 and x = 1. The fraction is 1/3.