\(यदि (A={1,2,3}), (B={1,2,3}) और (R={(x,y)\in A\times B:x+y\) is even}), तो (n(R)) क्या है?
\(If (A={1,2,3}), (B={1,2,3}), and (R={(x,y)\in A\times B:x+y\) is even}), what is (n(R))?
Explanation opens after your attempt
Correct Answer
C. (5)
Concept
The sum is even when both numbers have the same parity. Odd-odd gives (4) pairs and even-even gives (1), so total is (5).
Why this answer is correct
The correct answer is C. (5). The sum is even when both numbers have the same parity. Odd-odd gives (4) pairs and even-even gives (1), so total is (5).
Exam Tip
योग सम तब होगा जब दोनों संख्याएं समान समता की हों। विषम-विषम (4) और सम-सम (1) मिलकर कुल (5) युग्म देते हैं।
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