Poker probability The "nCr" function on most scientific calculators can be used to calculate hand frequencies; entering with and , for example, yields formula_2 as above. The royal flush is a case of the straight flush. It can be formed 4 ways (one for each suit), giving it a probability of 0.000154% and odds of 649,739 : 1. When ace-low straights and ace-low straight flushes are not counted, the probabilities of each are reduced: straights and straight flushes each become 9/10 as common as they otherwise would be. The 4 missed straight flushes become flushes and the 1,020 missed straights become no
Video poker a flush is 6 times the bet. Sometimes, 10/6 and 9/7 versions of Jacks or Better can be found as promotions. Bally Technologies All American video poker is based on Jacks or Better with an increased payout for flushes, straights and straight flushes, but reduced payout for full houses and two pairs (8-8-8-3-1 versus 9-6-4-3-2). The full pay version (quads return 50 bets), once common but now rare, is one of the highest return versions of video poker offered, but the play strategy is very complex and mastered by few. IGT's version of the game is called USA Poker. "Tens