Let's move on to C. So if the child is a female, so we begin Part C by assuming that the child is in fact a female. The question is, knowing that the child is a female, what is the probability that she is normal? So now, because we know that the child is female, the only thing we want to look at is this square. And this square. We don't want to consider these two squares because they contain the Y chromosome and that means they are male. So what is the probability?