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    jp004465 Posts: 2, Reputation: 1
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    #1

    Aug 30, 2010, 04:51 PM
    probability
    The probability that patient recovers from a delicate heart operation is 0.9. What is the probability that exactly 5 of the next 7 patients having this operation survive?
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    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Sep 1, 2010, 09:33 AM

    This is a binomial probability problem. Given the probability that something occurs is p, then the probability that the thing does not occur is (1- p). And the probability that p occurs exactly k times out of n trials is:



    For your problem p = 0.9, k = 5 and n = 7. Can you take it from here?

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