यदि \(A=\{-1,0,1,2\}\) और \(B=\{0,1,2\}\) है, तो \(A\times B\) में ऐसे कितने युग्म ((x,y)) हैं जिनके लिए (x+y=1) है?
If \(A=\{-1,0,1,2\}\) and \(B=\{0,1,2\}\), how many pairs ((x,y)) in \(A\times B\) satisfy (x+y=1)?
Explanation opens after your attempt
B. (3)
Concept
The valid pairs are ((-1,2)), ((0,1)), and ((1,0)). In exams, choose (x) and check (y=1-x).
Why this answer is correct
The correct answer is B. (3). The valid pairs are ((-1,2)), ((0,1)), and ((1,0)). In exams, choose (x) and check (y=1-x).
Exam Tip
सही युग्म ((-1,2)), ((0,1)) और ((1,0)) हैं। परीक्षा में (x) चुनकर (y=1-x) जांचें।
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