Assume the number of trucks passing an intersection has a Poisson distribution with mean of 5 trucks per minute.What is the probability of 0 or 1 trucks in one minute?
A).0404
B).0337
C).0842
D).0067

Question

Quizplus · Accepted Answer

The probability of 0 or 1 trucks in one minute is the sum of the probabilities of 0 and 1 trucks. The probability of 0 trucks is e^-5 = 0.0067, and the probability of 1 truck is 5e^-5 = 0.0337. Therefore, the probability of 0 or 1 trucks is 0.0067 + 0.0337 = 0.0404.

Assume the Number of Trucks Passing an Intersection Has a Poisson