On each slot there is an apple, orange, lemon, banana, melon, and a Joker. For this blog entry, we will assume that the slot machine has one line and takes only one coin per roll. Let us look at analyzing a pair of slot machines. (It is like weighted average, but not quite.) The payoff acts as a weight for each winning combination. Note that is different from the total of number of winning combinations over the number of possible combinations ratio. Σ(winning combination_k * payoff_k)/(number of possible combinations) In gambling, the term payout percent is used when describing how 'lucrative' the slot machine is. The harder the combination, the bigger the reward. (number of winning combinations)/(number of possible combinations)ĭifferent winning combinations offer different playoffs. The odds of getting a certain combination is:

Although I have never played on one (knowingly), you could have a slot machine were each slot itself has a different amount of symbols.Ĭalculating the probability of winning on a slot machine is fairly simple. For example for a three slot machine with six symbols a piece, the number possible combinations is 6 × 6 × 6 = 216. You multiply the number symbols each slot has together. The number of possible combinations is fairly easy to calculate.

Odds of winning on slot machines