(Answered) Question ron sue and ted arrive at the beginning of a

Statistics

Question: Ron, Sue, and Ted arrive at the beginning of a professor's office hours. The amount of time they will stay is exponentially distributed with means of 1, 1/2, and 1/3 hour.

(a) What is the expected time until only one student remains?

(b) For each student find the probability they are the last student left.

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