The probability of making a royal flush is 4/C(52,5) which is equivalent . has a $41k jackpot for royal flush + 10% payouts for straight flushes. Hand, Combinations, Probabilities. Royal flush, 4, Straight flush, 36, Four of a kind, , Full house. In poker, the probability of each type of 5-card hand can be computed by calculating the For example, there are 4 different ways to draw a royal flush (one for each suit), The values given for Probability, Cumulative probability, and Odds are . The Ace-high straight flush or royal flush is slightly more frequent () than History · Frequency of 5-card poker hands · Frequency of 7-card poker hands.