Question: Consider Example 19 on air conditioner maintenance. (a) Suppose that a location has only one air conditioner that needs servicing. What is the conditional probability

Consider Example 19 on air conditioner maintenance.
(a) Suppose that a location has only one air conditioner that needs servicing. What is the conditional probability mass function of the service time required, and the conditional expectation and standard deviation of the service time?
(b) Suppose that a location requires a service time of two hours. What is the conditional probability mass function of the number of air conditioner units serviced, and the conditional expectation and standard deviation of the number of air conditioner units serviced?

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