यदि \(A=\{1,2,3\}\) और \(B=\{1,2,3\}\), तो \(A\times B\) में विकर्ण युग्मों ((a,a)) की संख्या कितनी है?
If \(A=\{1,2,3\}\) and \(B=\{1,2,3\}\), how many diagonal pairs ((a,a)) are in \(A\times B\)?
Explanation opens after your attempt
Correct Answer
B. (3)
Concept
The diagonal pairs are ((1,1),(2,2),(3,3)), so the count is (3). For equal sets, the diagonal count is usually (|A|).
Why this answer is correct
The correct answer is B. (3). The diagonal pairs are ((1,1),(2,2),(3,3)), so the count is (3). For equal sets, the diagonal count is usually (|A|).
Exam Tip
विकर्ण युग्म ((1,1),(2,2),(3,3)) हैं, इसलिए संख्या (3) है। समान समुच्चयों में विकर्ण की संख्या सामान्यतः (|A|) होती है।
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