यदि \(A=\{1,2,3\}\) है और \(A\times B\) में कुल (15) अवयव हैं, तो (|B|) क्या होगा?
If \(A=\{1,2,3\}\) and \(A\times B\) has (15) elements, what is (|B|)?
Explanation opens after your attempt
C. (5)
Concept
Since (|A|=3) and \(3\cdot|B|=15\), (|B|=5). Divide to find the unknown cardinality.
Why this answer is correct
The correct answer is C. (5). Since (|A|=3) and \(3\cdot|B|=15\), (|B|=5). Divide to find the unknown cardinality.
Exam Tip
(|A|=3) और \(3\cdot|B|=15\), इसलिए (|B|=5)। अज्ञात कार्डिनलिटी के लिए भाग करें।
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