SOLUTION: Five identical and unbiased coins are shaken. What is the probability of obtaining 3 heads?
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Question 420709: Five identical and unbiased coins are shaken. What is the probability of obtaining 3 heads?
Found 2 solutions by sudhanshu_kmr, stanbon:
Answer by sudhanshu_kmr(1152) (Show Source): You can put this solution on YOUR website!
probability = 5C3 * (1/2)^3 * (1/2)^2
= 10 * 1/8 * 1/4
= 5/16
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Five identical and unbiased coins are shaken. What is the probability of obtaining 3 heads?
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Binomial Problem with n = 5 and p = 1/2
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P(x = 3) = 5C3(1/2)^3*(1/2)^2 = 10/32 = 5/16
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Cheers,
Stan H.
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