JEE Main & Advanced Mathematics Sets Question Bank Critical Thinking

  • question_answer If \[A=[x:x\] is a multiple of 3] and \[B=[x:x\] is a multiple of 5], then A - B is (\[\bar{A}\] means complement of A) [AMU 1998]

    A) \[\bar{A}\cap B\]

    B) \[A\cap \bar{B}\]

    C) \[\bar{A}\cap \bar{B}\]

    D) \[\overline{A\cap B}\]

    Correct Answer: B

    Solution :

    A - B = A Ç Bc = A Ç \[\bar{B}\].

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