यदि \(A=\{1,2,3,4,5\}\) और \(B=\{2,4,6,8,10\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (a+b=11) है?
If \(A=\{1,2,3,4,5\}\) and \(B=\{2,4,6,8,10\}\), how many pairs ((a,b)) in \(A\times B\) satisfy (a+b=11)?
Explanation opens after your attempt
B. (3)
Concept
The condition gives ((1,10),(3,8),(5,6)). Check whether (b=11-a) belongs to (B).
Why this answer is correct
The correct answer is B. (3). The condition gives ((1,10),(3,8),(5,6)). Check whether (b=11-a) belongs to (B).
Exam Tip
शर्त से ((1,10),(3,8),(5,6)) मिलते हैं। (b=11-a) (B) में है या नहीं, यह जाँचें।
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