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Math Help - [SOLVED] what does "n" mean?

  1. #1
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    [SOLVED] what does "n" mean?

    For instance, if A = (a,c,d,e) and B= (a,b) and C= (b,c,e,f), then what is n((A -B) - C)? And n(A ∩ B ∩ C)? What is this n?? Thanks for any help
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  2. #2
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    Quote Originally Posted by Allan89a View Post
    For instance, if A = (a,c,d,e) and B= (a,b) and C= (b,c,e,f), then what is n((A -B) - C)? And n(A ∩ B ∩ C)? What is this n?? Thanks for any help
    nA usually denotes the No of elements in the set,for example nA in the above problem is 4
    And n( A\cap B\cap C) = 0
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  3. #3
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    Yeah, I figured it out later on, but thanks!
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