यदि \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4\}\) और \(R=\{(a,b):a+b=5\}\), तो (R) में कितने अवयव हैं?
If \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4\}\), and \(R=\{(a,b):a+b=5\}\), how many elements are in (R)?
Explanation opens after your attempt
Correct Answer
C. (4)
Concept
The condition gives ((1,4),(2,3),(3,2),(4,1)), so there are (4) elements. A relation is a subset of \(A\times B\).
Why this answer is correct
The correct answer is C. (4). The condition gives ((1,4),(2,3),(3,2),(4,1)), so there are (4) elements. A relation is a subset of \(A\times B\).
Exam Tip
शर्त से ((1,4),(2,3),(3,2),(4,1)) मिलते हैं, इसलिए (4) अवयव हैं। संबंध \(A\times B\) का उपसमुच्चय होता है।
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