You arrive at the opening of a new cafe, which has only two chairs. Unfortunately, there are three people ahead of you in the line. You know that the number of minutes that a guest spends in a cafe is a geometric random variable with a mean 2, and that the time each guest spends in the cafe is independent of all other guests. What is the probability that you will have to wait strictly more than n minutes?

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Answer sin ce it is geometic dishibution mean IP thus NOw 3 persons ... View the full answer