Since 36 numbers take part in the drawing (half of which are red, and the other half are black, half are even numbers, and the other half are odd) and the number zero (Zero – Zero – French), the winnings on any bet are paid in proportion to the probability of the number or group of numbers on which the bet was made.

If the bet is made on the fact that an even number will fall out, then a win is paid in the amount of the bet, since the probability of an even number (there are exactly 18) is equal to the probability of an odd number (there are also 18 of them).

If a bet is placed on the fact that a certain number will fall out, for example 1, then in case of a win, an amount is paid that is 35 times higher than the bet, since the probability of hitting the number 1 is 35 times less than the probability of getting any other number out of the remaining 35 -ty.

Thus, the probability of winning in the first case is 18/36 = 1/2 or 50 percent. In the second case, the probability of winning is 1/36 or 2.778 percent. All these calculations would be quite fair and mathematically accurate, if not for Zero, which slightly changes the probability in favor of the bank. Zero is neither red, nor black, nor even, nor odd, nor does it belong to any of the dozens, nor to any row, nor to any column of numbers. You can bet on Zero as on a certain number, and in case of its hitting, the winning will be thirty-five times in relation to the bet. All other bets will lose when Zero comes up (except for a few special bets that allow you to combine Zero with other numbers).

Usually in all casinos in the world there is a limit bet The scheme of the playing field is given in the article Roulette playing field.

## Roulette bets can be divided into several classes:

- Bet “Equal chances” ( Chance Simple – fr.)

The odds of winning and losing are roughly equal. In case of winning, the bank pays a reward in the amount of the bet (1: 1). The chip is placed on the playing field with the corresponding bet designation in French or English.

Bet name | French name | Winnings |

Red | Rouge | 1: 1 |

Black | Noir | 1: 1 |

Even | Pair | 1: 1 |

Odd | Impair | 1: 1 |

Less (1-18) | Manque | 1: 1 |

More (19-36) | Passe | 1: 1 |

- Bet “On a number” ( En Plein – fr.)

The odds of winning are 1:35. In case of winning, the bank pays thirty-five times the reward (35: 1). The chip is placed on the playing field of the corresponding number. The figure shows a bet on the number 8.

- Bet “On two numbers” À Cheval – fr.)

The odds of winning are 1:17. In case of winning, the bank pays seventeen times the reward (17: 1). The chip is placed on the line separating the two numbers. It is also possible to bet on a combination of the Zero number with any of the numbers in the first row: 1, 2 or 3. Another name for the bet is split. The figure shows a bet on 2 numbers – 8 and 11.

- Bet “On four numbers” ( En Carre – fr.)

The odds of winning are 1: 8. In case of winning, the bank pays eight times the reward (8: 1). The chip is placed at an angle between four numbers. Another name for the bet is the corner.

- Bet “On a transverse row” ( Transversale plein – fr.)

There are three numbers in the transverse row. The odds of winning are 1:11. In case of winning, the bank pays an eleven-fold reward (11: 1). The chip is placed on the vertical line that delimits the row to the right or left.

- Bet “On a transverse row plus Zero” ( Transversale à 4 numeros – fr.)

Cross Row plus Zero are four numbers. The odds of winning are 1: 8. In case of winning, the bank pays eight times the reward (8: 1). The chip is placed at the angle between the first transverse row and Zero.

- Bet “On three numbers including Zero”

You can bet on a combination of two numbers of the first row and Zero. The odds of winning are 1:11. In case of winning, the bank pays eleven times the reward (11: 1). The chip is placed at the angle between two numbers and Zero.

- Bet “On two transverse rows” ( Transversale Simple – fr.)

There are six numbers in two adjacent transverse rows. The odds of winning are 1: 6. In case of winning, the bank pays a fivefold reward (5: 1). The chip is placed at the corner between the rows. Other names: Transversal (French) and Six Line (English)

- Bet ” per dozen” ( Douzaines – fr.)

There are three dozen:

First dozen (numbers 1-12), Middle dozen (numbers 13-24), Last dozen (numbers 25-36). The odds of winning are 1: 2. In case of winning, the bank pays a double reward (2: 1). The chip is placed on the field with the designation of the selected dozen.

- Bet “On a column” ( Colonnes – fr.)

There are twelve numbers in the column. The odds of winning are 1: 2. In case of winning, the bank pays a double reward (2: 1). The chip is placed on an empty field without a signature under each of the columns.