If by chance you get a bunch of heads, you might end up really kind of moving over to the left. If you get a bunch of tails, you might move over to the right. And we learned already that the odds of getting a bunch of tails, or many, many, many, many more tails than heads, is a lot lower than things kind of being equal or close to equal. And right here, what I've done, this is the mean number of left steps. And all I did is I got the probability, and we figured out the mean of the binomial distribution. The mean of the binomial distribution is essentially the probability of taking a left step times the total number of trials. And so that's equal to 5.