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Safari321
 3 years ago
Six students are pairing up to play tennis.In how many different ways can they pair up?
Safari321
 3 years ago
Six students are pairing up to play tennis.In how many different ways can they pair up?

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mridrik
 3 years ago
Best ResponseYou've already chosen the best response.1This is not permutations luis, it's combinations

mridrik
 3 years ago
Best ResponseYou've already chosen the best response.1he was saying that if Anne and Bill paired up, it would be different than Bill and Anne pairing up

mridrik
 3 years ago
Best ResponseYou've already chosen the best response.1it 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

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1pick one person, person A then their are 5 choices for partners. after that pick another, there are 3 choices of partners. then no choices

Safari321
 3 years ago
Best ResponseYou've already chosen the best response.0so there's a formula for combinations?

mridrik
 3 years ago
Best ResponseYou've already chosen the best response.1! 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

Safari321
 3 years ago
Best ResponseYou've already chosen the best response.0then that'll be the outcome of the of combinations?

mridrik
 3 years ago
Best ResponseYou've already chosen the best response.16! = 720, then we divide by 2! (which is just 2) times (62)! 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

Safari321
 3 years ago
Best ResponseYou've already chosen the best response.0okay mridrick thanks!
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