NO.PZ2019040801000018
问题如下:
Assume that the number of faulty vehicles is subject to the Possion distribution. And assume that 5% of the cars coming to the assembly line are faulty. Then randomly select 5 cars in the assembly line, and what is the probability that one of them is faulty?
选项:
A.0.195
B.0.235.
C.0.181.
D.0.179.
解释:
A is correct.
考点:Poisson Distribution
解析:根据Poisson分布的性质,λ=np=5*0.05=0.25
我看老师说当n特别大,p特别小的时候去用poisson分布。以这道题的数据来说可以用二项分布的公式吗?可以的话是怎么用的呢?不行的话又是哪里算不出来所以选择用poisson分布的呢?