So you have a 40% chance of getting a two. You have a 25% chance of getting a three, so it'll look like this. And then you have a 10% chance of getting a four. So it'll look like that. So this is a visualization of this discrete probability distribution where I didn't draw a vertical axis here, but this would be.1, this would be.15, this is.25, and that is.4. And then we see that the mean is at 2.1. The mean is at 2.1, which makes sense.