So to think about the probability of Marsha, so let me write this president, president is equal to Marsha, or vice president is equal to Sabitha, and secretary is equal to Robert. This is going to be, this right here is one possible outcome, one specific outcome, so it's one outcome out of the total number of outcomes over the total number of possibilities. Now what is the total number of possibilities? Well to think about that, let's just think about the three positions. You have president, you have vice president, and you have secretary. Now let's just assume that we're going to fill the slot of president first. We don't have to do president first, but we're just going to pick here.