यदि (n\(A\cup B\)=84) और (n\(A\cap B\)=27) है, तो (n(A-B)+n(B-A)) कितना है?
If (n\(A\cup B\)=84) and (n\(A\cap B\)=27), then what is (n(A-B)+n(B-A))?
Explanation opens after your attempt
A. (57)
Concept
The sum of the two only regions is union minus intersection (84-27=57). This is also the size of the symmetric difference.
Why this answer is correct
The correct answer is A. (57). The sum of the two only regions is union minus intersection (84-27=57). This is also the size of the symmetric difference.
Exam Tip
दोनों केवल भागों का योग संघ से प्रतिच्छेद घटाकर (84-27=57) है। यह सममित अंतर की संख्या भी है।
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