A die is tossed 5 times. Getting an odd number is considered a success. Then the variance of distribution of…

A die is tossed 5 times. Getting an odd number is considered a success. Then the variance of distribution of success is
  1. 8/3
  2. 3/8
  3. 4/5
  4. 5/4

Solution

The event follows binomial distribution with n = 5, p = 3/6 = 1/2 $q=1-p=1 / 2 \quad \therefore$ Variance $n p q=5 / 4$

Asked in: JEE Main 2002

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