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. The chance of getting Full House is 86:1. Only one of 93 combinations can be a Flush. Only one of 85 combinations can be a Straight. Only one of 13 combinations can be a Three of a Kind. Only one of 8 combinations can be a Two Pairs. 5:1 is a chance of getting a High Pair. Jackpot Poker Winning Strategy.