यदि \(A=\{1,2,3,4,5,6\}\) और \(B=\{1,2,3,4,5,6\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (a+b=7) और (a<b) दोनों हैं?
If \(A=\{1,2,3,4,5,6\}\) and \(B=\{1,2,3,4,5,6\}\), how many pairs ((a,b)) in \(A\times B\) satisfy both (a+b=7) and (a<b)?
Explanation opens after your attempt
Correct Answer
B. (3)
Concept
For sum (7) and (a<b), the pairs are ((1,6),(2,5),(3,4)). Apply combined conditions step by step.
Why this answer is correct
The correct answer is B. (3). For sum (7) and (a<b), the pairs are ((1,6),(2,5),(3,4)). Apply combined conditions step by step.
Exam Tip
योग (7) और (a<b) के लिए ((1,6),(2,5),(3,4)) मिलते हैं। संयुक्त शर्तों को क्रम से लगाएँ।
Login to save your score, XP, coins and progress.