यदि (A) और (B) सीमित समुच्चय हैं, तो (n\(A\setminus B\)) के लिए सही सूत्र कौन-सा है?
If (A) and (B) are finite sets, which is the correct formula for (n\(A\setminus B\))?
Explanation opens after your attempt
Correct Answer
A. (n(A)-n\(A\cap B\))
Concept
\(A\setminus B\) contains elements of (A) that are not in the common part. Hence (n\(A\setminus B\)=n(A)-n\(A\cap B\)).
Why this answer is correct
The correct answer is A. (n(A)-n\(A\cap B\)). \(A\setminus B\) contains elements of (A) that are not in the common part. Hence (n\(A\setminus B\)=n(A)-n\(A\cap B\)).
Exam Tip
\(A\setminus B\) में (A) के वे तत्व हैं जो साझा भाग में नहीं हैं। इसलिए (n\(A\setminus B\)=n(A)-n\(A\cap B\))।
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