Question

12 members of a video game club are having a tournament. In the first round every player will have to play against every other player. How many games will be in the first round of the tournament? @iambatman @dan815 @Luigi0210 @Compassionate

Answer 1

@sammixboo

Answer 2

@perl

Answer 3

@butterflydreamer

Answer 4

@AaronAndyson

Answer 5

Lets call the two players in the first round, player A and player B.
First you have 12 choices to pick for player A.
Then given that you picked a player for player A, there are eleven choices left to choose for player B. Therefore there are 12 x 11 ways in all .

Answer 6

I would say it is 12*11/2 as half of the matches have the same players but with the order reversed..