And if you want to factor a p out of this, this is going to be equal to p times, if you take p divided by p, you get a 1, p squared divided by p is p. So p times 1 minus p. Which is a pretty neat, clean formula. So our variance is p times 1 minus p. And if we want to take it to the next level and figure out the standard deviation, the standard deviation is just the square root of the variance. Which is equal to the square root of p times 1 minus p. And we can even verify that this actually works for the example that we did up here. 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.