यदि \(A=\{2,4\}\) और \(B=\{1,5\}\) हैं, तो \(A\times B\) में दोनों घटकों का योग विषम होने वाले कितने युग्म हैं?
If \(A=\{2,4\}\) and \(B=\{1,5\}\), how many pairs in \(A\times B\) have an odd sum of components?
Explanation opens after your attempt
Correct Answer
C. (4)
Concept
The first component is always even and the second is always odd, so every sum is odd. There are \(2\times 2=4\) pairs in total.
Why this answer is correct
The correct answer is C. (4). The first component is always even and the second is always odd, so every sum is odd. There are \(2\times 2=4\) pairs in total.
Exam Tip
पहला घटक हमेशा सम और दूसरा हमेशा विषम है, इसलिए हर योग विषम होगा। कुल \(2\times 2=4\) युग्म हैं।
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