Let X= {1,2,3}, Y= {}, Z= {1,2,3}, then which of the following is true?(a) X⊂Y(b) Only Y⊂X and Y⊂Z(c) Z⊂Y(d) Y⊂X and Y⊂Z and X⊂ZThis question was posed to me by my college professor while I was bunking the class.My enquiry is from Subsets topic in chapter Sets of Mathematics – Class 11

Let X= {1,2,3}, Y= {}, Z= {1,2,3}, then which of the following is true

1.	Let X= {1,2,3}, Y= {}, Z= {1,2,3}, then which of the following is true?(a) X⊂Y(b) Only Y⊂X and Y⊂Z(c) Z⊂Y(d) Y⊂X and Y⊂Z and X⊂ZThis question was posed to me by my college professor while I was bunking the class.My enquiry is from Subsets topic in chapter Sets of Mathematics – Class 11
Answer» The CORRECT option is (d) Y⊂X and Y⊂Z and X⊂Z For EXPLANATION: Null SET is the subset of EVERY set so Y⊂X and Y⊂Z. Since set X is equal to set Z so, Z⊂X and X⊂Z.

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