Because the expected value of y is pretty straightforward to directly compute. Expected value of y is just probability-weighted outcomes. So it's p times one plus one minus p, one minus p, times zero, times zero. This whole term's gonna be zero. And so the expected value of y is really just p. And so if you said the expected value of x, well that's just going to be, let me just write it over here, this is all review. We could say that the expected value of x is just going to be equal to, we know from our expected value properties, that's going to be equal to the sum of the expected values of these n y's. Or you could say it is n times the expected value, times the expected value of y.