यदि \(A=\{1,2,3,4\}\) और \(B=\{1,2,3,4\}\) है, तो \(A\times B\) में ऐसे युग्म ((x,y)) कितने हैं जिनके लिए \(x+y\le 5\) है?
If \(A=\{1,2,3,4\}\) and \(B=\{1,2,3,4\}\), how many pairs ((x,y)) in \(A\times B\) satisfy \(x+y\le 5\)?
Explanation opens after your attempt
C. (10)
Concept
For (x=1,2,3,4), the numbers of choices are (4,3,2,1). Total pairs are (4+3+2+1=10).
Why this answer is correct
The correct answer is C. (10). For (x=1,2,3,4), the numbers of choices are (4,3,2,1). Total pairs are (4+3+2+1=10).
Exam Tip
(x=1,2,3,4) के लिए क्रमशः (4,3,2,1) विकल्प हैं। कुल (4+3+2+1=10) युग्म मिलते हैं।
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