Our mean is p, the probability of success. We see that it indeed was, it was 0.6. And we know that our variance is essentially the probability of success times the probability of failure. That's our variance right over there. Probability of success in this example was 0.4, or probability of success was 0.6, probability of failure was 0.4. You multiply the two, you get 0.24, which is exactly what we got in the last example. And if you take its square root for the standard deviation, which is what we do right here, it's 0.49.