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
Four Card Poker out to be better than the dealer's. After seeing their cards and the dealer's face up card, the player can opt to fold the ante bet, in which case the player loses it, or play by betting 1-3 times their ante. Unlike Three Card Poker and some other games, the dealer always qualifies (plays). If the player ties or beats the dealer, the player is paid the amount bet. A bonus is paid if the player has a three of a kind (2-1 for the original ante bet only), straight flush (20-1), or four of a kind (25-1). This bonus