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Railways PYQCBT 1 2016

RRB NTPC · Question 30

Of the given three numbers, the second number is thrice the first and double the third. If the average of all three numbers is 77, find the value of the second number. A. 126 B. 145 C. 118 D. 136

  1. C

  2. D

  3. B

  4. A

Show answer & explanation

Answer: (D) A

Explanation

Let the second number be s. Then the first is s/3 and the third is s/2. Sum = s(1/3 + 1 + 1/2) = 11s/6 = 3 × 77 = 231, so s = 126.