The chances of getting winning combinations. Only one of 40,000 combinations can be a Royal Flush. 10,000:1 is a chance of getting a Straight Flush. Only one of 423 combinations can be a Four of a Kind. Only one of 86 combinations can be a Full House. 93:1 is a chance of getting a Flush. 85:1 is a chance of getting a Straight. 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. Draw Poker Royal Flush.