यदि (n(A-B)=23) और (n(B-A)=31) है, तो (n\(A\triangle B\)) कितना होगा?
If (n(A-B)=23) and (n(B-A)=31), what is (n\(A\triangle B\))?
Explanation opens after your attempt
A. (54)
Concept
The symmetric difference \(A\triangle B\) is the sum of the two separate regions (A-B) and (B-A). Hence (23+31=54).
Why this answer is correct
The correct answer is A. (54). The symmetric difference \(A\triangle B\) is the sum of the two separate regions (A-B) and (B-A). Hence (23+31=54).
Exam Tip
सममित अंतर \(A\triangle B\) दो अलग क्षेत्रों (A-B) और (B-A) का योग है। इसलिए (23+31=54)।
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