यदि (n(A)=42), (n(B)=35) और (n\(A\cup B\)=60) है, तो (n\(A\cap B\)) कितना होगा?
If (n(A)=42), (n(B)=35), and (n\(A\cup B\)=60), then what is (n\(A\cap B\))?
Explanation opens after your attempt
A. (17)
Concept
Use (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)). In exams, do not forget to subtract the common part.
Why this answer is correct
The correct answer is A. (17). Use (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)). In exams, do not forget to subtract the common part.
Exam Tip
सूत्र (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)) लगाइए। परीक्षा में संघ के प्रश्न में समान भाग घटाना न भूलें।
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