यदि \(A=\{2,3,5\}\) और \(B=\{4,6,10,12,15\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (b) (a) से विभाज्य है?
If \(A=\{2,3,5\}\) and \(B=\{4,6,10,12,15\}\), how many pairs ((a,b)) in \(A\times B\) have (b) divisible by (a)?
Explanation opens after your attempt
C. (9)
Concept
For (a=2,3,5), the counts of (b) are (4,3,2), totaling (9). Count multiples of each (a) in (B).
Why this answer is correct
The correct answer is C. (9). For (a=2,3,5), the counts of (b) are (4,3,2), totaling (9). Count multiples of each (a) in (B).
Exam Tip
(a=2,3,5) के लिए (b) के क्रमशः (4,3,2) मान मिलते हैं, कुल (9)। हर (a) के गुणज (B) में गिनें।
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