यदि \(A=\{1,2,3\}\) और \(B=\{4,5,6\}\), तो \(R=\{(a,b):b=a+3\}\) में कितने ordered pairs हैं?
If \(A=\{1,2,3\}\) and \(B=\{4,5,6\}\), how many ordered pairs are in \(R=\{(a,b):b=a+3\}\)?
Explanation opens after your attempt
B. (3)
Concept
The pairs are ((1,4),(2,5),(3,6)). Therefore there are (3) ordered pairs.
Why this answer is correct
The correct answer is B. (3). The pairs are ((1,4),(2,5),(3,6)). Therefore there are (3) ordered pairs.
Exam Tip
युग्म ((1,4),(2,5),(3,6)) मिलते हैं। इसलिए कुल (3) ordered pairs हैं।
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