SOLUTION: A coin is tossed three times find the probability that .exactly one tail turns up .at least two tail turn up .no tail turn up.
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-> SOLUTION: A coin is tossed three times find the probability that .exactly one tail turns up .at least two tail turn up .no tail turn up.
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Question 601688: A coin is tossed three times find the probability that .exactly one tail turns up .at least two tail turn up .no tail turn up. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A coin is tossed three times
Binomial Problems with n = 3 and p(tail) = 1/2
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find the probability that
.exactly one tail turns up
P(x = 1) = 3C1(1/2)(1/2)^2 = 3/8
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.at least two tail turn up
P(x = 2 or x = 3) = 3C2(1/2)^2(1/2) + 3C3(1/2)^3*(1/2)^0
= 3/8 + 1/8 = 4/8 = 1/2
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.no tail turn up.
P(x = 0) = 3C0(1/2)^0*(1/2)^3 = 1/8
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Cheers,
Stan H.
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