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QUESTION 9 4 Problem 9) A fair coin is tossed 20 times. A fair coin means that the probability of getting a head is the same
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Answer #1

Given,

n = 20

p = 0.5

For the binomial distribution,

Var (x) = n*p*(1-p)

Var (x) = 20 * 0.5 * ( 1 - 0.5 )

Var(x) = 5.

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