यदि \(A=\{1,2,3,4\}\) और \(R=\{(a,b):a=b\}\), तो (R) में कितने ordered pairs हैं?
If \(A=\{1,2,3,4\}\) and \(R=\{(a,b):a=b\}\), how many ordered pairs are in (R)?
Explanation opens after your attempt
B. (4)
Concept
The condition (a=b) gives only diagonal pairs. For (4) elements, there are (4) ordered pairs.
Why this answer is correct
The correct answer is B. (4). The condition (a=b) gives only diagonal pairs. For (4) elements, there are (4) ordered pairs.
Exam Tip
शर्त (a=b) केवल diagonal युग्म देती है। (4) अवयवों के लिए (4) ordered pairs मिलेंगे।
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