Mathematics, 21.11.2019 22:31 culbertchristi6111

Suppose that the length of a phone call in minutes is an exponential random variable with parameter λ = 1/ 8. if someone arrives immediately ahead of you at a public telephone booth, ﬁnd the probability that
(a) you will have to wait more than 5 minutes.
(b) you will have to wait between 10 and 20 minutes.
(c) if you have waited for 5 minutes, what is the probability that you will have to wait more than 15 minutes in total?

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Suppose that the length of a phone call in minutes is an exponential random variable with parameter...