यदि \(A=\{1,2,3,4\}\) और \(R=\{(a,b):a\ne b\}\) है, तो (R) में कितने pairs होंगे?
If \(A=\{1,2,3,4\}\) and \(R=\{(a,b):a\ne b\}\), how many pairs will be in (R)?
Explanation opens after your attempt
C. (12)
Concept
There are (16) pairs in \(A\times A\), and (4) diagonal pairs are removed. So (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) diagonal pairs are removed. So (16-4=12) pairs remain.
Exam Tip
\(A\times A\) में (16) pairs हैं और (4) diagonal pairs हटेंगे। इसलिए (16-4=12) pairs बचेंगे।
Login to save your score, XP, coins and progress.
