So variance of y is going to be equal to what? Well here it's going to be the probability squared distances from the expected value. So we have a probability of p, where what is going to be our squared distance from the expected value? Well, we're gonna get a one with a probability of p. So in that case, our distance from the mean, or from the expected value, we're at one. The expected value, we already know, is equal to p. So that's, for that possible outcome, the squared distance times its probability weight. And then we have, actually let me scroll over a little bit, well I'll just do it right over here. Plus we have a probability of one minus p, one minus p for the other possible outcome.