यदि \(A=\varnothing\) और \(B=\{9\}\) हैं, तो (n\(A\times B\)) कितना है?
If \(A=\varnothing\) and \(B=\{9\}\), what is (n\(A\times B\))?
Explanation opens after your attempt
A. (0)
Concept
There is no element in (A) for the first component, so no pair is formed. Since the number is asked, the answer is (0).
Why this answer is correct
The correct answer is A. (0). There is no element in (A) for the first component, so no pair is formed. Since the number is asked, the answer is (0).
Exam Tip
पहले घटक के लिए (A) में कोई तत्व नहीं है, इसलिए कोई युग्म नहीं बनेगा। संख्या पूछी गई है, इसलिए उत्तर (0) है।
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