Since we're not replacing the ball, the next ball I pick, there's going to be 55 possibilities. The ball after that, there's going to be 54 possibilities. Ball after that, there's going to be 53 possibilities. And then the ball after that, there's going to be 52 possibilities. 52, because I've already picked four balls out of that. Now this number right over here, when you multiply it out, this is the number of permutations if I cared about order. So if I got that exact combination.