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phone calls arrive at a computer help desk at a rate of 24 calls per hours. a. What is the probability of 3 calls in

phone calls arrive at a computer help desk at a rate of 24 calls per hours.

a. What is the probability of 3 calls in a 15-minute interval of time?

b. What is the probability of no class in a 15-minute interval?

c. What is the probability that at least one call comes in within a 30 minute interval?

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