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A barbershop requires appointments for perms and haircuts. Ten percent of those making appointments cancel or...

A barbershop requires appointments for perms and haircuts. Ten percent of those making appointments cancel or simply fail to show up. Next week's appointment calender has 64 appointments. Let X be the number of missed appointments out of the 64. The probability that more than 3 cancellations and/or no shows will occur during the week is:

Please explain in detail how to get the answer of .8937

Math   Statistics-And-Probability   
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