Answers

2015-05-25T17:56:06+05:30
Let

X={1,2,3}

 Y={1,2,3,4}

and U={1,2,3,4,5}

X ∩ (X ∪ Y)′ is equal to X ∩ U-{1,2,3,4}--->  X ∩ {5}---> φ

THEREFORE THE OPTION IS (C) φ
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