यदि \(A=\{1,2,3\}\) और \(B=\{1,2,3\}\), तो \(A\times B\) में \(a\ne b\) वाले युग्मों की संख्या कितनी है?
If \(A=\{1,2,3\}\) and \(B=\{1,2,3\}\), how many pairs in \(A\times B\) satisfy \(a\ne b\)?
Explanation opens after your attempt
C. (6)
Concept
There are (9) total pairs and (3) pairs with (a=b). So pairs with \(a\ne b\) are (9-3=6).
Why this answer is correct
The correct answer is C. (6). There are (9) total pairs and (3) pairs with (a=b). So pairs with \(a\ne b\) are (9-3=6).
Exam Tip
कुल (9) युग्म हैं और (a=b) वाले (3) युग्म हैं। इसलिए \(a\ne b\) वाले (9-3=6) हैं।
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