j think factors include the inherent probability of the event occurring, the amount of money at stake, the number of players in the game, and the rules and regulations of the specific game being played. For example, with the game of poker, the proposition of winning a hand depends on the player's skills, the number of cards in the deck, and the number of players in the game. In slot machines, the proposition of winning the jackpot depends on the number of symbols on the reels