Travelers arrive at a bus station from 6 am according to a, Ask an Expert

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Travelers arrive at a bus station from 6 a.m., according to a Poisson process with rate λ = 1 per minute. The first bus leaves T minutes after 6 a.m.

(a) Calculate the mean and the variance of the number of travelers ready to board this bus if (i) T has an exponential distribution with mean equal to 15 minutes and (ii) T is uniformly distributed between 0 and 20 minutes.

(b) Calculate the average number of passengers on the bus if it leaves at 6:15 and if its capacity is 20 passengers.

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