यदि \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4\}\) और \(R=\{(a,b):a\le b\}\), तो (R) में कितने अवयव हैं?
If \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4\}\), and \(R=\{(a,b):a\le b\}\), how many elements are in (R)?
Explanation opens after your attempt
C. (10)
Concept
For (a=1,2,3,4), the counts of (b) are (4,3,2,1), totaling (10). The symbol \(\le\) includes equality.
Why this answer is correct
The correct answer is C. (10). For (a=1,2,3,4), the counts of (b) are (4,3,2,1), totaling (10). The symbol \(\le\) includes equality.
Exam Tip
(a=1,2,3,4) के लिए (b) के (4,3,2,1) मान मिलते हैं, कुल (10)। \(\le\) में बराबरी शामिल होती है।
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