302. The number of automobile accidents on any day in a city has a Poisson distribution with mean 4. The number of accidents on a given day is independent of the number of accidents on any other day.
Calculate the probability that at most one accident occurs in a three-day period.
(A)





答案:A
統計:A:0,B:0,C:0,D:0,E:1
難度:計算中