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Railways PYQCBT 1 2020

RRB NTPC · Question 82

If A : B = 15 : 16, B : C = 8 : 25, C : D = 20 : 9, then find A : D.

  1. 2 : 3

  2. 3 : 2

  3. 4 : 3

  4. 3 : 4

Show answer & explanation

Answer: (A) 2 : 3

Explanation

A/D = (A/B)(B/C)(C/D) = 15/16 × 8/25 × 20/9 = 2400/3600 = 2/3, so A : D = 2 : 3.