यदि \(A=\{1,2,3,4\}\), तो \(A\times A\) में (a+b=5) वाले युग्मों की संख्या कितनी है?
If \(A=\{1,2,3,4\}\), how many pairs in \(A\times A\) satisfy (a+b=5)?
Explanation opens after your attempt
Correct Answer
C. (4)
Concept
The pairs are ((1,4),(2,3),(3,2),(4,1)). In \(A\times A\), both coordinates come from the same set.
Why this answer is correct
The correct answer is C. (4). The pairs are ((1,4),(2,3),(3,2),(4,1)). In \(A\times A\), both coordinates come from the same set.
Exam Tip
युग्म ((1,4),(2,3),(3,2),(4,1)) हैं। \(A\times A\) में दोनों घटक उसी समुच्चय से आते हैं।
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