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$3n+1$ people are to be divided into 3 committees, in such a way that every committee must have at least one member, and no person can serve on all three committees. In how many ways can they be divided?

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    Do the committees have a label/name?2012-03-28
  • 0
    Good question, but not in the MSE sense.2012-03-28
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    http://www.youtube.com/watch?v=uEx5G-GOS1k2012-03-28
  • 1
    So you're applying for [PROMYS](http://www.promys.org)?2012-03-28

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