Question 835074: A surgical technique is performed on seven patients. You are told there is a 70% chance of success. Find the probability that the surgery is successful for (a) exactly five patients, (b) at least five patients, and (c) less than five patients.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A surgical technique is performed on seven patients. You are told there is a 70% chance of success.
Binomial Problem with n = 7 and p(success) = 0.7
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Find the probability that the surgery is successful for
(a) exactly five patients::: 7C5*0.7^5*0.3^2 = binompdf(7,0.7,5) = 0.3177
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(b) at least five patients::: 1- binomcdf(7,0.7,4) = 0.6471
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(c) less than five patients:::binomcdf(7,0.7,4)= 0.3529
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Cheers,
Stan H.
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