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    Chances of making a sale on a phone call

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    Assume the probability that you will make a sale on any given phone call is 0.78. Find the probability that you (a) make your first sale on the 4th call, (b) make your first sale on the first, second, third, or fourth call, and (c) you do not make a sale on one of the first 4 calls.

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    Solution Summary

    The solution shows how to calculate the chances of making a sale on your phone calls based on binomial probabilities.