यदि \(A=\{1,2,3\}\) और \(B=\{2,4,6,8\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें \(\frac{b}{a}=2\) है?
If \(A=\{1,2,3\}\) and \(B=\{2,4,6,8\}\), how many pairs ((a,b)) in \(A\times B\) satisfy \(\frac{b}{a}=2\)?
Explanation opens after your attempt
Correct Answer
B. (3)
Concept
The condition is (b=2a), so the pairs are ((1,2),(2,4),(3,6)). Convert the fraction into a simple equation.
Why this answer is correct
The correct answer is B. (3). The condition is (b=2a), so the pairs are ((1,2),(2,4),(3,6)). Convert the fraction into a simple equation.
Exam Tip
शर्त (b=2a) है, इसलिए ((1,2),(2,4),(3,6)) मिलते हैं। भिन्न को सरल समीकरण में बदलें।
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