Teacher2Teacher 
Q&A #316 
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From: Rick Bonnell <rrbonnell12@comcast.net> To: Teacher2Teacher Public Discussion Date: 2005110418:24:38 Subject: "the Ten Hat Problem" can someone help me to teach my son "7th grade" the formula for this problem. Random probability,derangments,purmutations. 10 people all lose there hats a boy scout finds them and returns them, what is the probability of each getting there own hat.
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