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Railways PYQCBT 1 2016

RRB NTPC · Question 61

If the standard deviation of a population is 12, what will be the variance of the population? A. 144 B. 24 C. 72 D. 36

  1. B

  2. C

  3. D

  4. A

Show answer & explanation

Answer: (D) A

Explanation

Variance = (standard deviation)² = 12² = 144.