यदि (n\(A\cup B\)=115) और (n\(A\cap B\)=42) है, तो (n(A-B)+n(B-A)) कितना होगा?
If (n\(A\cup B\)=115) and (n\(A\cap B\)=42), then what is (n(A-B)+n(B-A))?
Explanation opens after your attempt
A. (73)
Concept
The sum of the two only-side regions is (115-42=73). This is also the size of \(A\triangle B\).
Why this answer is correct
The correct answer is A. (73). The sum of the two only-side regions is (115-42=73). This is also the size of \(A\triangle B\).
Exam Tip
केवल दोनों ओर के भागों का योग (115-42=73) है। यही \(A\triangle B\) की संख्या भी है।
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