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Sets: Find n(A)

  1. Jun 29, 2014 #1

    adjacent

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    1. The problem statement, all variables and given/known data
    attachment.php?attachmentid=70965&stc=1&d=1404035528.png
    ##n(A)##
    I have some doubts.
    Obviously, ##n(A)## means the number of elements in set A.
    Should it be 3 or 6?

    Should I consider each number to be a different element?
     

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  2. jcsd
  3. Jun 29, 2014 #2

    micromass

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    The names of the elements are irrelevant. If you change the names ##\{1,2,3\}## by ##\{a,b,c\}##, then it will have the same number of elements. Does that answer your question?
     
  4. Jun 29, 2014 #3

    adjacent

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    Yes, thank you :smile:
     
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