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JEE Main & Advanced Mathematics Sets Question Bank Self Evaluation Test - Sets

  • question_answer
    If \[A=\{1,2,3,4,5\}\], then the number of proper subsets of A is

    A) 31

    B)                                38

    C) 48

    D) 54

    Correct Answer: A

    Solution :

    [a]Note: Number of proper subsets of \[A={{2}^{n}}-1\]Given: \[A=\{1,2,3,4,5\}\] Here \[n=5\] \[\therefore \] no. of proper subsets \[={{2}^{5}}-1\]


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