यदि \(A=\{1,2\}\) और \(B=\{3,4,5\}\) हैं, तो \(A\times B\) में पहले घटक (2) वाले कितने युग्म होंगे?
If \(A=\{1,2\}\) and \(B=\{3,4,5\}\), how many pairs in \(A\times B\) have first component (2)?
Explanation opens after your attempt
Correct Answer
A. (3)
Concept
When the first component (2) is fixed, the second component can be any of the (3) elements of (B). Hence there are (3) pairs.
Why this answer is correct
The correct answer is A. (3). When the first component (2) is fixed, the second component can be any of the (3) elements of (B). Hence there are (3) pairs.
Exam Tip
पहला घटक (2) तय करने पर दूसरा घटक (B) के (3) अवयवों में से कोई भी हो सकता है। इसलिए (3) युग्म मिलेंगे।
Login to save your score, XP, coins and progress.