The Simple Chances are popular among beginners and are also called as 50-50 chances. However, this term obscures that the real probability by no means 50 percent, but only 48.65 percent. This is due to the Zero that gives the casino a permanent advantage of 1.35 percent for the Simple Chances.

Simple Chances means all bettings on Red, Black, Even, Odd, or Manque (low numbers 1-18) and Passe (high numbers 19-36). In the event of a win, the stake is multiplied by factor 1, and paid in addition to the original stake.

The payout ratio is therefore used in this example with a stake of 10:
Payout = stake * 1 + stake = 10 * 1 + 10 = 20

If the player bets on a Simple Chance and Zero appears, the stake is halfed and returned to the player, or blocked for the next round. If it should win in the next round, the stake is free again and is unchanged (no deductibles and no winnings) paid back to the player.

The Simple Chances are very popular for a number of different roulette strategies. Compare the section on roulette strategies.

For differences on the Simple Chances in American and European Roulette read here.