\(यदि (R={(x,y):x+y\) विषम है}) है, तो कौन-सा pair (R) में नहीं है?
\(If (R={(x,y):x+y\) is odd}), which pair is not in (R)?
Explanation opens after your attempt
D. ( (4,8) )
Concept
Since (4+8=12) is even, it will not belong to the odd-sum relation. For an odd sum, one number should be even and the other odd.
Why this answer is correct
The correct answer is D. ( (4,8) ). Since (4+8=12) is even, it will not belong to the odd-sum relation. For an odd sum, one number should be even and the other odd.
Exam Tip
(4+8=12) सम है, इसलिए यह odd-sum relation में नहीं आएगा। विषम योग के लिए एक संख्या सम और दूसरी विषम होनी चाहिए।
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