Different winning combination have different chances of coming out. Only one of 40,000 combinations can be a Royal Flush. The chance of getting Straight Flush is 10,000:1. 423:1 is a chance of getting a Four of a Kind. Only one of 86 combinations can be a Full House. 93:1 is a chance of getting a Flush. The chance of getting Straight is 85:1. Only one of 13 combinations can be a Three of a Kind. Only one of 8 combinations can be a Two Pairs. Only one of 5 combinations can be a High Pair. Jackpot Poker Royal Flush.