यदि \(A=\{1,2,3\}\) और \(B=\{1,2,3,4\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (a+b) (3) से विभाज्य है?
If \(A=\{1,2,3\}\) and \(B=\{1,2,3,4\}\), how many pairs ((a,b)) in \(A\times B\) have (a+b) divisible by (3)?
Explanation opens after your attempt
B. (4)
Concept
The pairs with sum divisible by (3) are ((1,2),(2,1),(2,4),(3,3)). Hence there are (4) pairs.
Why this answer is correct
The correct answer is B. (4). The pairs with sum divisible by (3) are ((1,2),(2,1),(2,4),(3,3)). Hence there are (4) pairs.
Exam Tip
योग (3) से विभाज्य होने वाले युग्म ((1,2),(2,1),(2,4),(3,3)) हैं। इसलिए कुल (4) युग्म हैं।
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