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How do you find mean of probabilty distribution of a balanced coin so that no of flips obtained in 3 flips?
Wiki User
∙ 11y ago
Prob of 0 Heads = 1/8
Prob of 1 Head = 3/8
Prob of 2 Heads = 3/8
Prob of 3 Heads = 1/8
Mean number of Heads = Sum of [x*Prob of x Heads] where the sum is over all possible values of x.
= 0*1/8 + 1*3/8 + 2*3/8 + 3*1/8 = 12/8 = 3/2 or 1.5
Wiki User
∙ 11y ago
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