Originally Posted by

**CautionItsHot** A manufacturer of rockets estimates that on average 1 in 75 of the rockets fail to burn properly.Using this estimate, and a Poisson distribution, find an approximate value for the probability that out of 225 randomly chosen rockets at most 221 burn properly.

How do i solve this question using poisson distribution? I solve this question using binomial dist, using X~B(225,74/75) P(Xless than or =221). But the question says use poisson?How do i do it the poisson way?