Roullete is a casino game in which a small ball is spun around on a wheel and players place bets on which number or grouping of numbers the ball will land. Bets may be placed on a single number, various groups of numbers (such as odd or even), whether the number is red or black, and so forth. The odds of winning a bet are based on the probability of each choice. Bets that are placed on a number or grouping of numbers are known as inside bets, while those that are placed on other parts of the board are known as outside bets.

A Straight Up Bet (called carré in French) is a wager that the ball will land on one of the numbers 1 through 36. This bet pays out 35 chips if the number wins and loses if the zero or 00 is hit. All winning bets remain the player’s property until a request to the contrary is made.

The Dozens Bet (called douzaine in French) is a bet that the winning number will be in either the first dozen (12 numbers), second dozen (18 numbers), or third dozen (19 numbers). This is another even money bet, with a payout of 2-1.