The customer support department for a major computer supplier believes that the time between consecutive phone inquiries is exponentially distributed, with an average value of 60 seconds.
Part a What is the probability that the time between two consecutive phone inquiries is less than 50 seconds?
Part b Consider a random selection of 100 consecutive phone inquiries. What is the probability that the average time between consecutive inquiries in this random sample is less than 50 seconds?
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