Using the example above 1/37, this means that the single number on the roulette will hit one time out of 37 spins.Įxpression by the odds (x to 1) - Each time X occurs, the chosen phenomenon happens one time. In numerical terms, we use the calculation of percentages. probability that the single number on the roulette (Straight) will fall: 1/37 * 100 = 2.7%Įxpression using fractions (1 / x) - If we express the probability using a fraction, we say that the phenomenon occurs 1 time from X attempts. We can also use fractions or ratios.Įxpression as a percentage (%) - Probability is calculated as (Event / Outcomes) * 100.
There are several ways to write down a probability. Note: All numbers in the article refer to European Roulette - so we count on 37 numbers. Everything in a casino is related to the probability and house edge. And thanks to it, the casino always wins over the long run. Anyone who runs a casino or makes online casino games knows the probability theory very well.