यदि (n\(A\cup B\)=96), (n(A)=58) और (n(A-B)=29) है, तो (n(B-A)) कितना होगा?
If (n\(A\cup B\)=96), (n(A)=58), and (n(A-B)=29), what is (n(B-A))?
Explanation opens after your attempt
A. (38)
Concept
First (n\(A\cap B\)=58-29=29), then (n(B-A)=96-29-29=38). Subtract only (A) from total (A) to get the common part.
Why this answer is correct
The correct answer is A. (38). First (n\(A\cap B\)=58-29=29), then (n(B-A)=96-29-29=38). Subtract only (A) from total (A) to get the common part.
Exam Tip
पहले (n\(A\cap B\)=58-29=29), फिर (n(B-A)=96-29-29=38)। कुल (A) से केवल (A) घटाकर साझा भाग निकालें।
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