And so like all random variables, this is taking particular outcomes and converting them into numbers. And this random variable, it could take on the value X equals zero, one, two, three, four, or five. And what I wanna do is figure out, well, what's the probability that this random variable takes on zero, can be one, can be two, can be three, can be four, can be five. And so to do that, first let's think about how many possible outcomes are there from flipping a fair coin five times. So let's think about this. So let's write possible outcomes, possible outcomes from five flips. From five flips.