You have two possible engines times four possible colors, two times four, and you see that right here, one group of four, two groups of four. So this outcome right here is a four-cylinder blue car. And this outcome over here is a six-cylinder green car. So there's eight equally possible outcomes, and which outcome matches the one that we, I guess, are hoping for, the white six-cylinder car? Well, that's this one right over here. It's one of eight equally likely events, so we have a 1 8th probability. Now, this wasn't the only way that we could have drawn the T diagram.