यदि (n(A)=72), (n(B)=67) और (n\(A\cup B\)=101) है, तो (n\(A\triangle B\)) कितना है?
If (n(A)=72), (n(B)=67) and (n\(A\cup B\)=101), then what is (n\(A\triangle B\))?
Explanation opens after your attempt
A. (63)
Concept
First (n\(A\cap B\)=72+67-101=38), then (n\(A\triangle B\)=101-38=63). The symmetric difference excludes the common part.
Why this answer is correct
The correct answer is A. (63). First (n\(A\cap B\)=72+67-101=38), then (n\(A\triangle B\)=101-38=63). The symmetric difference excludes the common part.
Exam Tip
पहले (n\(A\cap B\)=72+67-101=38), फिर (n\(A\triangle B\)=101-38=63) है। सममित अंतर में साझा भाग शामिल नहीं होता।
Login to save your score, XP, coins and progress.
