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This is not permutations luis, it's combinations
he is wrong
he was saying that if Anne and Bill paired up, it would be different than Bill and Anne pairing up
it can be written as nCr which means n choose r, where n is larger. so in this case it is 6 choose 2, and to find the answer, you plug them into this formula: |dw:1331001470884:dw|
pick one person, person A then their are 5 choices for partners. after that pick another, there are 3 choices of partners. then no choices
so there's a formula for combinations?
! means factorial, and you multiply by all the natural numbers less than the number in front of the !, so for 6! it would be, 6 x 5 x 4 x 3 x 2 x 1
then that'll be the outcome of the of combinations?
6! = 720, then we divide by 2! (which is just 2) times (6-2)! 2 x 4! = 4 x 3 x 2 x 2 x 1 = 48, so the answer is 720 divided by 48 which simplifies to 15
okay mridrick thanks!