यदि \(A=\{0,1,2,3\}\) और \(B=\{1,2\}\) हैं, तो \(A\times B\) में कितने युग्म ((x,y)) ऐसे हैं कि (x-y=1)?
If \(A=\{0,1,2,3\}\) and \(B=\{1,2\}\), how many pairs ((x,y)) in \(A\times B\) satisfy (x-y=1)?
Explanation opens after your attempt
Correct Answer
A. (2)
Concept
The valid pairs are ((2,1)) and ((3,2)). A quick method is to choose elements of (B) and then find (x).
Why this answer is correct
The correct answer is A. (2). The valid pairs are ((2,1)) and ((3,2)). A quick method is to choose elements of (B) and then find (x).
Exam Tip
सही युग्म ((2,1)) और ((3,2)) हैं। दिए हुए (B) के अवयवों से (x) निकालना तेज तरीका है।
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