यदि \(A=\{1,2,3\}\) और \(B=\{3,4,5\}\) हैं, तो \(A\times B\) में कितने युग्म ((x,y)) ऐसे हैं कि (y-x=2)?
If \(A=\{1,2,3\}\) and \(B=\{3,4,5\}\), how many pairs ((x,y)) in \(A\times B\) satisfy (y-x=2)?
Explanation opens after your attempt
A. (3)
Concept
The valid pairs are ((1,3),(2,4),(3,5)). In such conditions, choose (x) first and then find (y).
Why this answer is correct
The correct answer is A. (3). The valid pairs are ((1,3),(2,4),(3,5)). In such conditions, choose (x) first and then find (y).
Exam Tip
सही युग्म ((1,3),(2,4),(3,5)) हैं। ऐसी शर्तों में पहले (x) चुनकर (y) निकालना आसान है।
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