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Railways PYQCBT 1 2016

RRB NTPC · Question 75

The median of a set of ascending order observation 11, 12, 14, 15, x + 1, x + 3, 20, 23, 25, 27 is 17. Then find the value of x. A. 16 B. 15 C. 18 D. 17

  1. C

  2. D

  3. A

  4. B

Show answer & explanation

Answer: (D) B

Explanation

With 10 values, the median is the average of the 5th and 6th: (x + 1 + x + 3)/2 = x + 2 = 17, so x = 15.