यदि \(A=\{a,b\}\) और \(B=\{1\}\) हैं, तो \(A\times B\) में कितने क्रमित युग्म होंगे?
If \(A=\{a,b\}\) and \(B=\{1\}\), how many ordered pairs are in \(A\times B\)?
Explanation opens after your attempt
Correct Answer
B. (2)
Concept
Here \(|A\times B|=|A|\cdot |B|=2\cdot1=2\). This formula is very useful for counting relations.
Why this answer is correct
The correct answer is B. (2). Here \(|A\times B|=|A|\cdot |B|=2\cdot1=2\). This formula is very useful for counting relations.
Exam Tip
\(|A\times B|=|A|\cdot |B|=2\cdot1=2\)। संबंधों में गिनती के लिए यह सूत्र बहुत उपयोगी है।
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