यदि \(A=\{1,2,3,4\}\) और \(B=\{3,4,5,6\}\), तो (n(A-B)+n(B-A)) क्या है?
If \(A=\{1,2,3,4\}\) and \(B=\{3,4,5,6\}\), what is (n(A-B)+n(B-A))?
Explanation opens after your attempt
B. (4)
Concept
(A-B={1,2}) and (B-A={5,6}). Hence (n(A-B)+n(B-A)=2+2=4).
Why this answer is correct
The correct answer is B. (4). (A-B={1,2}) and (B-A={5,6}). Hence (n(A-B)+n(B-A)=2+2=4).
Exam Tip
(A-B={1,2}) और (B-A={5,6}) है। इसलिए (n(A-B)+n(B-A)=2+2=4)।
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