यदि \(A=\{1,2,3,4,5,6,7\}\) और \(B=\{0,1,2,3\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (a-2b=1) है?
If \(A=\{1,2,3,4,5,6,7\}\) and \(B=\{0,1,2,3\}\), how many pairs ((a,b)) in \(A\times B\) satisfy (a-2b=1)?
Explanation opens after your attempt
Correct Answer
C. (4)
Concept
The condition gives (a=2b+1), so for (b=0,1,2,3), (a=1,3,5,7). There are (4) pairs in total.
Why this answer is correct
The correct answer is C. (4). The condition gives (a=2b+1), so for (b=0,1,2,3), (a=1,3,5,7). There are (4) pairs in total.
Exam Tip
शर्त (a=2b+1) देती है, इसलिए (b=0,1,2,3) पर (a=1,3,5,7) मिलते हैं। कुल (4) युग्म हैं।
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