Well the sunfish are 10 out of the 20 fish, so at any given time he's trying to catch fish, there's a 10 in 20 chance, or you could say a 1 1 2 probability that's going to be a sunfish. So the probability that you get three sunfish in a row is going to be 1 1 2, times 1 1 2, times 1 1 2. And they put the fish back in, so that's why it stays 10 out of the 20 fish. If he wasn't putting the fish back in, then the second sunfish, you would have a nine out of 20 chance of the second one being a sunfish. But in this case, they keep replacing the fish every time they catch it. So there's a 1 8th chance that Jeremy catches three sunfish. So this right over here is 1 8th.