यदि \(A=\{1,2,3\}\) और \(B=\{3,6,9,12\}\), तो \(A\times B\) में (b) संख्या (a) का गुणज हो, ऐसे युग्म कितने हैं?
If \(A=\{1,2,3\}\) and \(B=\{3,6,9,12\}\), how many pairs in \(A\times B\) have (b) as a multiple of (a)?
Explanation opens after your attempt
C. (10)
Concept
For (a=1) there are (4), for (a=2) there are (2), and for (a=3) there are (4) pairs. Total is (10).
Why this answer is correct
The correct answer is C. (10). For (a=1) there are (4), for (a=2) there are (2), and for (a=3) there are (4) pairs. Total is (10).
Exam Tip
(a=1) पर (4), (a=2) पर (2), और (a=3) पर (4) युग्म मिलते हैं। कुल (10) है।
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