यदि \(A=\{1,2,3,4\}\) और \(B=\{2,4,6,8\}\) है, तो \(A\times B\) में ऐसे कितने युग्म ((x,y)) हैं जिनके लिए (y) (x) का गुणज है?
If \(A=\{1,2,3,4\}\) and \(B=\{2,4,6,8\}\), how many pairs ((x,y)) in \(A\times B\) have (y) as a multiple of (x)?
Explanation opens after your attempt
D. (11)
Concept
For (x=1) there are (4), for (x=2) there are (4), for (x=3) there is (1), and for (x=4) there are (2). Total is (11).
Why this answer is correct
The correct answer is D. (11). For (x=1) there are (4), for (x=2) there are (4), for (x=3) there is (1), and for (x=4) there are (2). Total is (11).
Exam Tip
(x=1) से (4), (x=2) से (4), (x=3) से (1), और (x=4) से (2) युग्म मिलते हैं। कुल (4+4+1+2=11) है।
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