Question 1093874: A con is flipped 12 times what is the probability of getting
(1)no heads
2) no more than 3 heads
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A coin is flipped 12 times
Binomial Problem with n = 12 and p = 1/2
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what is the probability of getting
(1)no heads
P(x = 0) = 12C0*(1/2)^0*(1/2)^12 = 1*1*(1/2)^12 = 1/2^12
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2) no more than 3 heads
P(0<= x <=3) = binomcdf(12,1/2,3) = 0.0730
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Cheers,
Stan H.
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