यदि \(A=\{1,3,5\}\) और \(B=\{2,6,10\}\) हैं, तो \(A\times B\) में कितने युग्म ((x,y)) ऐसे हैं कि (y=2x)?
If \(A=\{1,3,5\}\) and \(B=\{2,6,10\}\), how many pairs ((x,y)) in \(A\times B\) satisfy (y=2x)?
Explanation opens after your attempt
A. (3)
Concept
The valid pairs are ((1,2),(3,6),(5,10)). Choosing (x) first and then finding (y) is a quick method.
Why this answer is correct
The correct answer is A. (3). The valid pairs are ((1,2),(3,6),(5,10)). Choosing (x) first and then finding (y) is a quick method.
Exam Tip
सही युग्म ((1,2),(3,6),(5,10)) हैं। पहले (x) चुनकर (y) निकालना तेज तरीका है।
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