यदि \(A=\{1,2,3,4\}\) पर \(R=\{(a,b):a\neq b\}\), तो (R) में कितने ordered pairs हैं?
On \(A=\{1,2,3,4\}\), how many ordered pairs are in \(R=\{(a,b):a\neq b\}\)?
Explanation opens after your attempt
C. (12)
Concept
There are (16) pairs in \(A\times A\), and (4) pairs with (a=b) are removed. Hence (16-4=12) pairs remain.
Why this answer is correct
The correct answer is C. (12). There are (16) pairs in \(A\times A\), and (4) pairs with (a=b) are removed. Hence (16-4=12) pairs remain.
Exam Tip
\(A\times A\) में (16) युग्म हैं और (a=b) वाले (4) युग्म हटते हैं। इसलिए (16-4=12) pairs रहेंगे।
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