During Off-Hours, Cars Arrive at a Tollbooth on the East-West

Multiple Choice

During off-hours, cars arrive at a tollbooth on the East-West toll road at an average rate of .5 cars per minute. The arrivals are distributed according to a Poisson distribution. What is the probability that during the next minute, three cars will arrive?

A) .9856
B) .3033
C) .0126
D) .8956