So we have another 1 there. So there you have it. We're done. The probability that our random variable, the number of cars that pass in an hour, is equal to a particular number, you know, it's equal to 7 cars pass in an hour, is equal to the limit as n approaches infinity of n choose k times, well, we said it was lambda over n to the k successes, times 1 minus lambda over n to the n minus k failures. And we just showed that this is equal to lambda to the kth power over k factorial times e to the minus lambda. And that's pretty neat, because when you just see it in kind of a vacuum, if you have no context for it, you wouldn't guess that this is in any way related to the binomial theorem. I mean, it's got an e in there.