यदि \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4,5\}\) और \(R=\{(a,b):b-a\in{0,2}\}\) है, तो (|R|) क्या है?
If \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4,5\}\), and \(R=\{(a,b):b-a\in{0,2}\}\), what is (|R|)?
Explanation opens after your attempt
Correct Answer
B. (7)
Concept
The condition (b-a=0) gives (4) pairs and (b-a=2) gives (3). The total is (7) pairs.
Why this answer is correct
The correct answer is B. (7). The condition (b-a=0) gives (4) pairs and (b-a=2) gives (3). The total is (7) pairs.
Exam Tip
(b-a=0) से (4) और (b-a=2) से (3) युग्म मिलते हैं। कुल (7) युग्म हैं।
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