यदि \(A=\{1,2,3\}\) और \(B=\{2,4,6,8\}\), तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (b=2a) है?
If \(A=\{1,2,3\}\) and \(B=\{2,4,6,8\}\), how many pairs ((a,b)) in \(A\times B\) satisfy (b=2a)?
Explanation opens after your attempt
Correct Answer
B. (3)
Concept
For (a=1,2,3), we get (b=2,4,6), all in (B). Therefore there are (3) pairs.
Why this answer is correct
The correct answer is B. (3). For (a=1,2,3), we get (b=2,4,6), all in (B). Therefore there are (3) pairs.
Exam Tip
(a=1,2,3) से (b=2,4,6) मिलते हैं, और ये (B) में हैं। इसलिए (3) युग्म हैं।
Login to save your score, XP, coins and progress.