So, let me spell heads properly. Two heads. So the probability of flipping of exactly two heads, and the word exactly is important, because if you didn't say exactly, then maybe three heads, well, you flip two heads, so you have to say exactly two heads. So you don't include the situation where you get three heads. So the probability of flipping exactly two heads is equal to the three outcomes with two heads divided by the eight possible outcomes, or 3 8ths. So it is equal to 3 8ths. And we are done.