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Combinatorics question

  1. Nov 25, 2011 #1
    Please help me with combinatorics:
    I have three sets:
    A with elements (a1 ……..ai )
    B with elements (b1 ……..bk )
    C with elements (c1 ……..cj )

    Pls help me to work out how many sets ABC shall I have that contain each element from sets A, B and C

    Thanks much
  2. jcsd
  3. Nov 25, 2011 #2
    You can try to simplify the problem first by considering something you can do by simple enumeration with A (a1,a2) B(b1,b2) and C(c1,c2). Then you try to generalize your results. Of course there are better ways, fancier etc but at least you have a starting point.
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