On average, a litter of cats has 5 kittens. Let X be the number of kittens in a litter of cats.
In 20 litters of kittens, what is the probability that at most 15 litters have exactly 5 kittens?
^^I am having trouble answering this question. If I set another variable Y = the number of litters that have exactly 5 kittens, then it becomes binomial with n=20, but the p value is unknown. This is where I get stuck.