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If X and Y are two sets such that X uuY...

If X and Y are two sets such that X `uu`Y has 50 elements, X has 28 elements and Y has 32 elements, how many elements does X `nn`Y have?

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Knowledge Check

  • If X and Y are two sets such that (XuuY) has 60 elements, X has 38 elements and Y has 42 elements, how many elements does (XnnY) have?

    A
    11
    B
    20
    C
    13
    D
    None of these

  • If X and Y are two sets such that X has 40 elements, X uu Y has 60 elements and X nn Y has 10 elements, how many elements does Y have ?

    A
    25
    B
    35
    C
    30
    D
    40

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