Question

On a highway, cars pass according to a Poisson process with rate 5 per minute. Trucks pass according to a Poisson process with rate 3 per minute. The two processes are independent. Let Nc(t) and NT(t) denote the number of cars and trucks that pass in t minutes, respectively. Then N(1)=NC(1)+NT(1) is the number of vehicles that pass in minutes. Find P(NT(3)-71N(3)-20)· f) Find E(N(4)INT(3)-7). Hint: NT(4)={NT(4)-NT(3)}+NT(3).

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