यदि \(A=\{1,2,3\}\) और \(B=\{2,4,6\}\) हैं, तो \(A\times B\) में कितने युग्म ((x,y)) ऐसे हैं कि (y) सम संख्या है?
If \(A=\{1,2,3\}\) and \(B=\{2,4,6\}\), how many pairs ((x,y)) in \(A\times B\) have (y) even?
Explanation opens after your attempt
A. (9)
Concept
All (3) elements of (B) are even and pair with (3) elements of (A). Hence \(3\times3=9\) pairs are obtained.
Why this answer is correct
The correct answer is A. (9). All (3) elements of (B) are even and pair with (3) elements of (A). Hence \(3\times3=9\) pairs are obtained.
Exam Tip
(B) के सभी (3) अवयव सम हैं और (A) के (3) अवयवों से जुड़ते हैं। इसलिए \(3\times3=9\) युग्म मिलते हैं।
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