Thus this is even less likely than occurrence of a single number six times in a row.īy Ion Saliu, Founder of Roulette Mathematics The probability of the 32fold repetition of the same color in American Roulette is much more lower: (18/38) 32 = 0. Here are the odds of getting 15 spins in a row without your Dozen/Column hitting: European Roulette: (25/37)^15 = 0.2793% – This works out at 1 in 358 chance. Suppose a Roulette wheel has landed on black 5 times in a row, which is more likely for the 6th role that it lands on red or black? If a WNBA player shoots 70% from the foul line explain why it is incorrect to say that there is a 50% chance she will make her next free throw. Just remember the roulette wheel has no memory – it. Following a series of “red” five times in a row, the probability for black always remains the same: 18/37 = 48.65%.

True odds are the real world chance of a certain outcome, whereas the house odds are the payout ratio for the same scenario and are typically slightly lower. If you want to excel at roulette, then you really need to understand the maths behind it.