Parameter. And for the sake of argument, just to make things concrete, let's just say that 60% of the gumballs are yellow, or 0.6 of them. Now let's review some things that we have seen before. I'm gonna define our Bernoulli random variable. Let's call this capital Y, which is equal to one if when we take one random gumball out of that machine, we get a, we pick a yellow gumball. And it's equal to zero if when we pick one random gumball out of that machine, we don't pick yellow. So not yellow.