But if we think about it in very simple terms, all a probability is saying is the number of events, or I guess you could say the number of ways in which this action or this event happens. So this is what the definition of the probability is. It's going to be the number of ways in which event can happen, and when we talk about the event, we're talking about having all four ones in my hand. That's the event. And all of these different ways, that's sometimes called the event space. But we actually want to count how many ways that if I get a hand of nine, picking from 36, that I can get the four ones in it, so this is the number of ways in which my event can happen. And we want to divide that into all of the possibilities.