So if we’re playing $1 on black, then we know that for 18 of 37 outcomes we will net $1 profit, and for 19 of the 37 possible outcomes we will net a $1 loss. To find out the effect the odds have on a measurable outcome, we can apply that outcome to all possible results. Likewise when playing an even money bet at roulette, that option covers 18 of the 37 possible outcomes: 18/37=.48648649. If you want to know what is the probability that the coin will come up heads, then that would be: heads / (heads + tails) = 1/2 =. ![]() For instance, when you flip a coin there are 2 possible outcomes: heads, tails. We know that the probability of an event happening is the chances of that event compared to all the possible events. ![]() Here is the step by step logic of applying probability in roulette to the possible outcomes.įirst, all the mathematics used here is based on a European single 0 wheel since the house edge is half the American version. If one understands the basics of probability theory, then in roulette especially it is very easy to test betting systems mathematically.
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