यदि \(A=\{2,3,4\}\) और \(B=\{6,8,9,12\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (a) (b) को विभाजित करता है?
If \(A=\{2,3,4\}\) and \(B=\{6,8,9,12\}\), how many pairs ((a,b)) in \(A\times B\) have (a) dividing (b)?
Explanation opens after your attempt
B. (7)
Concept
For (a=2,3,4), the counts of (b) are (3,3,1), totaling (7). Check each divisor separately.
Why this answer is correct
The correct answer is B. (7). For (a=2,3,4), the counts of (b) are (3,3,1), totaling (7). Check each divisor separately.
Exam Tip
(a=2,3,4) के लिए (b) के क्रमशः (3,3,1) मान मिलते हैं, कुल (7)। विभाज्यता में प्रत्येक भाजक अलग जाँचें।
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