roulett
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Roulette is not a 50/50 chance game. In fact, it's a game of chance where the odds are not evenly split. The outcome of each spin is determined by the random landing of the ball on a numbered pocket of the roulette wheel.
Probabilities for Roulette
1
There are a total of 38 spaces, and so the probability that a ball lands on one particular space is 1/38.
2
There are 18 red spaces, and so the probability that red occurs is 18/38.
3
There are 20 spaces that are black or green, and so the probability that red does not occur is 20/38.