यदि (n(A-B)=38) और (n(B-A)=27) है, तो (n\(A\triangle B\)) कितना होगा?
If (n(A-B)=38) and (n(B-A)=27), what is (n\(A\triangle B\))?
Explanation opens after your attempt
B. (65)
Concept
The symmetric difference includes only (A) and only (B), so (38+27=65). The common part is not included.
Why this answer is correct
The correct answer is B. (65). The symmetric difference includes only (A) and only (B), so (38+27=65). The common part is not included.
Exam Tip
सममित अंतर में केवल (A) और केवल (B) वाले भाग आते हैं, इसलिए (38+27=65)। साझा भाग इसमें शामिल नहीं होता।
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