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What is the probability that when they leave that none of them is wearing either of their own shoes?

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Three ladies get together for a bit of fun. When they arrive they all kick off their shoes. Unfortunately, when they leave they are not quite in the same frame of mind so they each grab a left shoe and a right shoe at random, and put them on.
What is the probability that when they leave that none of them is wearing either of their own shoes?

posted Sep 30, 2018 by anonymous

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