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NDA Math Sets Relations and Functions

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Question : 68

Total: 90

Consider the following in respect of sets A and B:
1 .(A−B)∪B=A
2.‌(A−B)∪A=A
3. (𝐴−𝐵)∩𝐵=ϕ
4. A⊆B⇒A∪B=B
Which of the above are correct?

1, 2 and 3
2, 3 and 4
1, 3 and 4
1, 2 and 4

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