I want to figure out how to calculate the probability of drawing 4 different kinds of royals Ace, King, Queen, and Jack when you start with 10 cards in your hand(doesn't matter what suit or color). So you're choosing 10 cards. I know its something to do with nCr and favored over possible, etc... so in a game two players are draw 10 cards each, I want to figure out the probability of someone drawing the 4 different royals, i dont care about duplicate royals, only care about them getting all.