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If X and Yare two sets such that XY=XY, then

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By Expert Faculty of Sri Chaitanya
a
X⊂Y,X≠Y
b
Y⊂X, Y≠X
c
X=Y
d
none of these
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detailed solution

Correct option is C

X⊂Y⇒ X∩Y=X, X∪Y=YY⊂X ⇒ X∩Y=Y, X∪Y=X.So, X∩Y=X∪Y ⇒X=Y


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