(e) On a given hour, 200 clients enter McDonald's. Each one, independently of others, buys either...
(e) On a given hour, 200 clients enter McDonald's. Each one, independently of others, buys either a hamburger (with probability ), French fries (with probability), or does not buy anything and just uses the toilet (with probability ). Approximate the probability that the number of guests who do not buy anything exceeds 40.