SOLUTION: How do i calculate the probability that at least 3 exams out of 7 being taken will be passed?

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Question 934790: How do i calculate the probability that at least 3 exams out of 7 being taken will be passed?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How do i calculate the probability that at least 3 exams out of 7 being taken will be passed?
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You have to know the probability that one of the
exams will be passed; and you have to assume
that probability holds for each of the exams.
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Then P(x = 3) = 7C3*p^3*(1-p)^4
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Cheers,
Stan H.
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