यदि (n(A)=42), (n(B)=38) और (n\(A\cap B\)=17) है, तो (n\(A'\cap B\)) कितना है?
If (n(A)=42), (n(B)=38) and (n\(A\cap B\)=17), then what is (n\(A'\cap B\))?
Explanation opens after your attempt
Correct Answer
A. (21)
Concept
\(A'\cap B\) means (B-A), so it is (38-17=21). Connect the notation with the only (B) region in the Venn diagram.
Why this answer is correct
The correct answer is A. (21). \(A'\cap B\) means (B-A), so it is (38-17=21). Connect the notation with the only (B) region in the Venn diagram.
Exam Tip
\(A'\cap B\) का अर्थ (B-A) है, इसलिए (38-17=21) है। प्रतीक को वेन आरेख के केवल (B) क्षेत्र से जोड़कर देखें।
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