This one right over here, having two heads meets our constraints. So this is, and there's only one of those possibilities. I've only circled one of the four scenarios. So there's a 1 4th chance of that happening. Another way you could think about this, and this is because these are independent events, and this is a very important idea to understand in probability, and we'll also study scenarios that are not independent, but these are independent events. What happens in the first flip in no way affects what happens in the second flip. This is actually one thing that many people don't realize.