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Railways PYQCBT 1 2016

RRB NTPC · Question 19

If A : B = 3 : 4 and B : C = 6 : 5 then A : (A + C) is: A. 9 : 11 B. 9 : 10 C. 9 : 19 D. 6 : 7

  1. D

  2. B

  3. A

  4. C

Show answer & explanation

Answer: (D) C

Explanation

Make B equal in both ratios: A : B = 3 : 4 = 9 : 12 and B : C = 6 : 5 = 12 : 10. So A = 9 and C = 10, A + C = 19, and A : (A + C) = 9 : 19.