What is the probability of getting all four of the ones? So they want to know the probability of getting all four of the ones. So all four ones in my hand of nine. Now this is kind of daunting at first. You're like, gee, I have nine cards and I'm kicking them out of 36. I have to figure out how do I get all of the ones. 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.