10. Suppose that the concessionaire at a football stadium finds that during a typical game, 20% of the attendees buy both a hot-dog and a beer, 30% buy only a beer, 20% buy only a hot-dog, and 30% buy neither. What is the probability that a random sample of 15 game attendees will have 3 who buy both, 2 who buy only a beer, 7 who buy only a hot-dog and 3 who buy neither?