Multiple Choice Questions on Consider the following in respect of sets A and B 1 A minus B cup B A 2 zwnj A minus B cup A A 3 A m........... for NDA Exam Preparation

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Multiple Choice Questions

Consider the following in respect of sets A and B 1 A minus B cup B A 2 zwnj A minus B cup A A 3 A m...........

Mathematics (NDA) Set theory
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    Consider the following in respect of sets A and B:

    1 .(A−B)∪B=A

    2.‌(A−B)∪A=A

    3. (A−B)∩B=\phi

    4. A⊆B⇒A∪B=B

    Which of the above are correct?

    1, 2 and 3

    Incorrect Answer

    2, 3 and 4

    Correct Answer

    1, 3 and 4

    Incorrect Answer

    1, 2 and 4

    Incorrect Answer
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    Explanation:

    By property,
    (A−B)∪A=A,(A−B)∩B=\phi
    A⊆B⇒A∪B=B are true

    By: Munesh Kumari
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