A PE Teacher brings along some students to a PE room to get some basketballs and volleyballs. Each student can take two such balls. How many students must be PE teacher bring so that at least two students take the same types of balls?

Consider an example of a deck of 52 cards: example set of 52 playing cards: 13 of each suit clubs, diamonds, hearts, and spades ace 2 3 4 5 6 7 8 9 10 jack queen king clubs diamonds hearts spades what is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.