Roulette is a game where you place bets on the number that will be rolled in a particular spin. For example, if you bet on number five, the probability of landing on that number in a single roll is 5/36 or about 12.5%. If you bet on any other number, the probability is 1/36 or about 2.
5%. So, if you bet $5 on every spin of the roulette wheel, your expected return would be $0.10 per spin ($50 total). Assuming that roulette wheels always spin 36 times, this would result in a net loss of $4.60 over the course of one hour playing! In other words, it’s not really worth it to bet on roulette – unless you really love losing money!.
