यदि \(A=\{3,6,9,12,15\}\) और \(B=\{6,12,18\}\) है, तो (A-B) क्या होगा?
If \(A=\{3,6,9,12,15\}\) and \(B=\{6,12,18\}\), what is (A-B)?
Explanation opens after your attempt
A. ( {3,9,15} )
Concept
(A-B) keeps elements of (A) that are not in (B). Always start from the first set in difference.
Why this answer is correct
The correct answer is A. ( {3,9,15} ). (A-B) keeps elements of (A) that are not in (B). Always start from the first set in difference.
Exam Tip
(A-B) में (A) के वे अवयव रहते हैं जो (B) में नहीं हैं। अंतर में हमेशा पहले समुच्चय से शुरुआत करें।
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