The binomial probability formula is used to calculate the probability of an event occurring given a certain number of trials and a certain success rate. In this case, we are using it to calculate the probability of McGuire hitting more than 61 homeruns in a season, given that he averages 1 homerun every 11.9 at-bats. We can use the formula to calculate the probability of McGuire hitting 61 or more homeruns in a season as follows: P(x >= 61) = 1 - P(x <= 60) P(x <= 60) = (20 C 60) * (0.119)^60 * (1 - 0.119)^(20-60) P(x <= 60) = 0.988 Therefore, the probability of McGuire hitting 61 or more homeruns in a season is 1 - 0.988, or 0.012. This means that there is a 1.2% chance of McGuire breaking Maris' record over the course of a 20-season career