Instead of dividing it into minutes, why don't I divide it into seconds? So the probability that I have k successes, instead of 60 intervals, I'll do 3,600 intervals. And so the probability of k successful seconds, so a second where a car is passing at that moment, out of 3,600 possible seconds, so that's 3,600, choose k, times the probability that a car passes in any given second. Well, that's the probability, that's the expected number of cars in an hour divided by number of seconds in an hour. And we're going to have k successes, and then we're going to have, and these are the failures, the probability of failure, and you're going to have 3,600 minus k failures. And this would be even a better approximation. This actually would not be so bad, but still you have the situation where two cars can come within a half a second of each other, and you say, oh, OK, Sal, I see the pattern here.