यदि \(A=\{1,2,3,4\}\) और \(B=\{2,4,6\}\) हैं, तो \(A\times B\) में कितने युग्म ((x,y)) ऐसे हैं कि (y) सम है?
If \(A=\{1,2,3,4\}\) and \(B=\{2,4,6\}\), how many pairs ((x,y)) in \(A\times B\) have (y) even?
Explanation opens after your attempt
B. (12)
Concept
All (3) elements of (B) are even and pair with (4) elements of (A). Hence \(4\times3=12\) pairs are formed.
Why this answer is correct
The correct answer is B. (12). All (3) elements of (B) are even and pair with (4) elements of (A). Hence \(4\times3=12\) pairs are formed.
Exam Tip
(B) के सभी (3) अवयव सम हैं और (A) के (4) अवयवों से जुड़ते हैं। इसलिए \(4\times3=12\) युग्म बनेंगे।
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