यदि \(A=\{1,2,3\}\) और \(B=\{2,4\}\) है, तो \(A\times B\) में दूसरे घटक (4) वाले कितने युग्म होंगे?
If \(A=\{1,2,3\}\) and \(B=\{2,4\}\), how many pairs in \(A\times B\) have second component (4)?
Explanation opens after your attempt
Correct Answer
C. (3)
Concept
When the second component (4) is fixed, the first component can be any of the (3) elements of (A). With a fixed second component, the count is (n(A)).
Why this answer is correct
The correct answer is C. (3). When the second component (4) is fixed, the first component can be any of the (3) elements of (A). With a fixed second component, the count is (n(A)).
Exam Tip
दूसरा घटक (4) तय होने पर पहला घटक (A) के (3) तत्वों में से कोई भी हो सकता है। निश्चित दूसरे घटक के साथ संख्या (n(A)) होती है।
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