Question: Internet service providers (ISP) need to resolve customer problems as quickly as possible. For one ISP, past data indicate that the likelihood is 0.75 that

Internet service providers (ISP) need to resolve customer problems as quickly as possible.

For one ISP, past data indicate that the likelihood is 0.75 that customer calls regarding Internet service interruptions are resolved within one hour.

Out of the next 15 customer calls about interrupted service,

a. What is the probability that exactly 13 will be resolved within one hour?

b. What is the probability that at least 13 will be resolved within one hour?

c. How many customers would be expected to have their service problems resolved within one hour?

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