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Railways PYQCBT 1 2020

RRB NTPC · Question 69

The sum of two numbers is 20 and their difference is 2.5. Ratio of these numbers will be:

  1. 7 : 9

  2. 9 : 7

  3. 3 : 5

  4. 2 : 7

Show answer & explanation

Answer: (B) 9 : 7

Explanation

The numbers are (20 + 2.5)/2 = 11.25 and (20 − 2.5)/2 = 8.75. Ratio 11.25 : 8.75 = 9 : 7.