यदि \(A=\{r,s,t,u\}\) और \(B=\{5,6\}\) हैं, तो \(A\times B\) में दूसरा घटक (6) वाले कितने युग्म होंगे?
If \(A=\{r,s,t,u\}\) and \(B=\{5,6\}\), how many pairs in \(A\times B\) have second component (6)?
Explanation opens after your attempt
Correct Answer
A. (4)
Concept
When the second component (6) is fixed, the first component can be any of the (4) elements of (A). So there are (4) pairs.
Why this answer is correct
The correct answer is A. (4). When the second component (6) is fixed, the first component can be any of the (4) elements of (A). So there are (4) pairs.
Exam Tip
दूसरा घटक (6) तय होने पर पहला घटक (A) के (4) अवयवों में से कोई भी हो सकता है। इसलिए (4) युग्म होंगे।
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