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Old 05-13-2003, 12:22 PM   #1 (permalink)
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probability

My 5th grader thought this was extremely thought provoking.

If 20 people put there hats into a bag, close their eyes and each take out one hat. What is the probability that exactly 19 of them will get their own hat back?


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The probability that exactly 19 will get thier own hat is zero. Because if 19 get theri own then the 20th would get his/her own as well.
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Old 05-13-2003, 01:07 PM   #2 (permalink)
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so how about presenting the kid with a more difficult problem? Stretch the young mind to it's limits, he/she is obviously very interested in math if they consider that thought-provoking.

I remember taking math that was 2 grades higher than my class when I was that young... i loved it.
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