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Question 86Asked in DSSSB TGT Computer Science (Technical), 7 Aug 2021, Shift 2

If the probability of winning a match is 0.7 then what is the value of variance?

  1. A0.7
  2. B0.3
  3. C0.21
  4. D0.31
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Correct answer: (C) 0.21

Explanation

For a single trial (Bernoulli), variance = p × q = 0.7 × 0.3 = 0.21.

From DSSSB TGT Computer Science PYQ (Technical), 7 Aug 2021, Shift 2

This is question 86 of DSSSB TGT Computer Science PYQ (Technical), 7 Aug 2021, Shift 2. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.