यदि \(A=\{1,2,3,4\}\) और \(B=\{2,3,4\}\) हैं, तो \(A\times B\) में कितने युग्म ((x,y)) ऐसे हैं कि \(x\le y\)?
If \(A=\{1,2,3,4\}\) and \(B=\{2,3,4\}\), how many pairs ((x,y)) in \(A\times B\) satisfy \(x\le y\)?
Explanation opens after your attempt
C. (9)
Concept
For (y=2), there are (2) pairs; for (y=3), (3) pairs; and for (y=4), (4) pairs. Total pairs are (2+3+4=9).
Why this answer is correct
The correct answer is C. (9). For (y=2), there are (2) pairs; for (y=3), (3) pairs; and for (y=4), (4) pairs. Total pairs are (2+3+4=9).
Exam Tip
(y=2) के लिए (2) युग्म, (y=3) के लिए (3) युग्म और (y=4) के लिए (4) युग्म हैं। कुल (2+3+4=9) युग्म मिलते हैं।
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