Math miscellaneousHard

Question

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

Options

A.8/3
B.3/8
C.4/5
D.5/4

Solution

The event follows binomial distribution with n = 5, p = 3/6 = 1/2
q = 1 - p = 1/2 ∴ Variance npq = 5/4

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