Customers arrive at a drive-through teller window of a bank. they stay in line when the teller is busy. the service time is exponentially distributed with a mean of four minutes. a. what is the probability that the next customer in line will take longer than seven minutes to be served? b. what is the probability that the next customer in line will take less than eight minutes to be served? c. what is the probability that the next customer in line will take between three and six minutes to be served?

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any options?

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all group life insurance is term insurance. actually it is annual renewable term and it is rated on the average age and claims experience of the entire group, which is called "experience rating." remember, this type of insurance has a 31-day grace period and is convertible to whole life upon leaving employment. a contributory group plan requires that both the employer and the employees pay part of the premium. at least 75% of those eligible must participate, so the group is sure to get most of the healthy employees as well as those that are sick.

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