यदि (n(A-B)=20), (n\(A\cap B\)=15) और (n(B)=47) है, तो (n(B-A)) ज्ञात कीजिए।
If (n(A-B)=20), (n\(A\cap B\)=15), and (n(B)=47), find (n(B-A)).
Explanation opens after your attempt
A. (32)
Concept
Set (B) contains (B-A) and \(A\cap B\), so (B-A=47-15=32). Do not get confused by the given (A-B).
Why this answer is correct
The correct answer is A. (32). Set (B) contains (B-A) and \(A\cap B\), so (B-A=47-15=32). Do not get confused by the given (A-B).
Exam Tip
(B) में (B-A) और \(A\cap B\) आते हैं, इसलिए (B-A=47-15=32)। दिए गए (A-B) से भ्रमित न हों।
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