यदि \(A=\{1,2,3,4\}\) और \(B=\{1,2,3\}\), तो \(A\times B\) में \(a+b\le5\) वाले युग्मों की संख्या कितनी है?
If \(A=\{1,2,3,4\}\) and \(B=\{1,2,3\}\), how many pairs in \(A\times B\) satisfy \(a+b\le5\)?
Explanation opens after your attempt
C. (9)
Concept
For (a=1,2,3,4), the choices of (b) are (3,3,2,1). Total is (9).
Why this answer is correct
The correct answer is C. (9). For (a=1,2,3,4), the choices of (b) are (3,3,2,1). Total is (9).
Exam Tip
(a=1,2,3,4) पर (b) के विकल्प क्रमशः (3,3,2,1) हैं। कुल (9) है।
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