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Question

Ryan reaches into his gym bag for a pair of running shoes. If there are seven different pairs of shoes loose in the bag, how many ways can he pick two shoes that do not match?
14 years ago

Answers

MathMate
Number of ways he can choose two shoes
=14C2
=14!/(2!12!)
=14*13/2
=91
Number of ways he can choose matching shoes
= 7
So how many ways can he choose non-matching shoes?
14 years ago
Anonymous
adawdawd
8 years ago

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