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JEE Main & Advanced Mathematics Sets Question Bank Numerical Value Type Questions - Sets

  • question_answer
    Given \[n(U)=20,\] \[n(A)=12,\] \[n(B)=9,\]\[n(A\cap B)=4,\] where U is the universal set, A and B are subsets of U, then \[n({{(A\cup B)}^{c}})=\]

    Answer:

    3


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