यदि \(X=\{1,3,5,7\}\) और \(Y=\{3,7,9\}\) हैं, तो (Y-X) ज्ञात कीजिए।
If \(X=\{1,3,5,7\}\) and \(Y=\{3,7,9\}\), find (Y-X).
Explanation opens after your attempt
A. ( {9} )
Concept
(Y-X) contains elements of (Y) that are not in (X). Here only (9) satisfies this.
Why this answer is correct
The correct answer is A. ( {9} ). (Y-X) contains elements of (Y) that are not in (X). Here only (9) satisfies this.
Exam Tip
(Y-X) में (Y) के वे अवयव हैं जो (X) में नहीं हैं। यहां (9) ही ऐसा अवयव है।
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