And actually let me do a few more terms here. So let me erase this a little bit, do a few more terms. This is going to be the probability that X equals two, sorry, the probability that X equals three, times three. And we're going to keep going on and on and on. Well what's this going to be? Well the probability that X equals three is we're going to have to get two unsuccessful trials. And so the probability of two unsuccessful trials is one minus P squared.