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. And so we have one half multiplied by one half multiplied by one half. And that gives us one 8th. And we continue the process.