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Approximately 18% of the calls to an airline reservation phone line result in a reservation being made. (a) suppose that an operator handles 15 calls. what is the probability that none of the 15 calls result in a reservation?

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  1. Today, 19:19
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    Answer: The probability that none of the calls would result in a reservation would be 0.72%.

    Since there is an 18% chance that there would be a reservation, then there is a 72% chance that there is not a reservation.

    Our goal is to determine the likelihood that there are no calls. Or that the 72% chance event happens 15 times.

    We can use the following expression to find that repeated probability.

    (0.72) ^15 = 0.0072 or 0.72%
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