So there's a 0.4 probability that you get a 0. And if you get a 0, what's the distance from 0 to the mean? The distance from 0 to the mean is 0 minus 0.6. Or I could even say 0.6 minus 0. Same thing because we're going to square it. 0 minus 0.6 squared. Remember, the variance is the probability or the weighted sum of the squared distances.