यदि \(A=\{1,2,3,4\}\) और \(B=\{1,3\}\) हैं, तो \(A\times B\) में कितने युग्म ((x,y)) ऐसे हैं कि (x) विषम है?
If \(A=\{1,2,3,4\}\) and \(B=\{1,3\}\), how many pairs ((x,y)) in \(A\times B\) have (x) odd?
Explanation opens after your attempt
Correct Answer
A. (4)
Concept
The odd elements in (A) are (1) and (3), and each pairs with (2) elements of (B). Therefore \(2\times2=4\) pairs are formed.
Why this answer is correct
The correct answer is A. (4). The odd elements in (A) are (1) and (3), and each pairs with (2) elements of (B). Therefore \(2\times2=4\) pairs are formed.
Exam Tip
(A) में विषम अवयव (1) और (3) हैं, और हर एक (B) के (2) अवयवों से जुड़ेगा। इसलिए \(2\times2=4\) युग्म होंगे।
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