SOLUTION: Suppose that 30% of all telephone calls at work are for personal reasons. If a random sample of 15 is taken what is the probability that 4 or fewer are for personal reasons?

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Question 742864: Suppose that 30% of all telephone calls at work are for personal reasons. If a random sample of 15 is taken what is the probability that 4 or fewer are for personal reasons?
Answer by stanbon(75887) About Me  (Show Source):
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Suppose that 30% of all telephone calls at work are for personal reasons. If a random sample of 15 is taken what is the probability that 4 or fewer are for personal reasons?
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Binomial Problem with n = 15 and p(personal) = 0.30
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P(0<= x <=4) = binomcdf(15,0.30,4) = 0.5155
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Cheers,
Stan H.