And that gives us one eight. Now let's look at this block right here, this square. So this basically describes the probability. We have a boy in the first time, the boy in a second time, and a girl on the third time on the third try. So we have a blue boy, then we have the second child, we have the red boy, and then we have a girl. And once again, to calculate what the probability of this event taking place is, we take the product of the individual probabilities of these three events.