Question

A die is rolled 360 times.find the mean, variance and standard deviation of the number of 4s that will be rolled.​

Answer 1

Answer:

Binomial distribution with n=360 and p(4) = 1/6

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mean = np = 360*(1/6) = 60

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variance = npq = 60(5/6) = 50

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std = sqrt(npq) = 5*sqrt(2)