यदि \(A=\{9\}\) और \(B=\varnothing\) है, तो (n\(A\times B\)) कितना होगा?
If \(A=\{9\}\) and \(B=\varnothing\), what is (n\(A\times B\))?
Explanation opens after your attempt
A. (0)
Concept
There is no element in (B), so no second component is available. 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 (B), so no second component is available. Since the number is asked, the answer is (0).
Exam Tip
(B) में कोई तत्व नहीं है, इसलिए कोई दूसरा घटक नहीं मिल सकता। संख्या पूछी गई है, इसलिए उत्तर (0) है।
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