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Customers of a computer manufacturer call customer service at an average rate of 20 calls per...

Customers of a computer manufacturer call customer service at an average rate of 20 calls per hour. Use a Binomial process with 5-second frames to find the probability of no more than 8 calls during the next 15 min.  (Round to four decimal places.)

0.6691 and 0.9320 are incorrect!

Math   Statistics-And-Probability   
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