Traffic exiting the Arlington Turnpike at Exit 123 conforms roughly to the Poisson conditions. The average number

Question:

Traffic exiting the Arlington Turnpike at Exit 123 conforms roughly to the Poisson conditions. The average number of cars exiting is 6 per minute. Compute the probability of
a. Exactly 4 cars exiting during the next minute observed.
b. At least 10 cars exiting during the next minute observed.
c. No more than one car exiting during the next minute and a half.
d. Exactly two cars exiting during the next thirty seconds observed.