So we'll call that mean 1 is equal to P1. And the variance here, the variance of this first distribution, I should have done everything in yellow actually. I'll do everything in yellow. So the mean of this distribution is P1. The variance of this distribution, we'll call that variance 1, is just these two proportions multiplied by each other. So it's P1 times 1 minus P1. And we saw this many, many videos ago when we learned about Bernoulli distributions.