I think Statistical probabilities are essential in casino gambling because all games have a built-in "house edge". This means that the odds are always slightly in favor of the casino. For example, in roulette, there are 18 red numbers, 18 black numbers, and two green numbers (0 and 00). The payout for betting on a single number is 35:1, but the actual odds of winning are 37:1. This means that the house has a 5.26% edge on every bet.