Suppose that people check their coats in a checkroom. If all claim checks are lost and the coats are randomly returned, what is the probability that all the people will get their own coats back?.

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.