Question: 6.68 The average consultation time for a patient in an ENT department of a hospital is 15 minutes. (a) Assuming that the consultation times for

6.68 The average consultation time for a patient in an ENT department of a hospital is 15 minutes.

(a) Assuming that the consultation times for the patients are independent and exponential, what is the expected consultation time for two random patients?

(b) What is the probability that the total consultation time for these two patients exceeds 40 minutes?

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