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TS EAMCET20215 Aug 2021Evening ShiftMathematicsProbabilityActual

A die is rolled 5 times. Getting an odd number in one trail is considered as a success. The variance of the distribution of successes is

Options

  1. A8 3
  2. B3 8
  3. C4 5
  4. D5 4

Correct answer

D. 5 4

Step-by-step solution

The variance of the distribution = n p q , where, n is the number of experiment, p is success probability and q is failure probability. The probability of success, p = 3 6 = 1 2 The probability of failure, q = 3 6 = 1 2 Total number of trials, n = 5 So, the variance, n p q = 5 4

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