Suppose that time between two telephone calls at an ofce in, Ask an Expert

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Suppose that time between two telephone calls at an of?ce, in minutes, is uniformly dis- tributed on the interval [0, 20]. If there were 15 calls, (i) what is the probability that the longest time interval between calls is less than 15 minutes? (ii) What is the probability that the shortest time interval between calls is greater than 5 minutes?

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