यदि \(A=\{1,3,5\}\) और \(B=\{2,4\}\) हैं, तो \(A\times B\) में पहले घटक (3) वाले कितने युग्म होंगे?
If \(A=\{1,3,5\}\) and \(B=\{2,4\}\), how many pairs in \(A\times B\) have first component (3)?
Explanation opens after your attempt
Correct Answer
B. (2)
Concept
The first component (3) is fixed and the second component is chosen from the (2) elements of (B). The number of such pairs is (n(B)).
Why this answer is correct
The correct answer is B. (2). The first component (3) is fixed and the second component is chosen from the (2) elements of (B). The number of such pairs is (n(B)).
Exam Tip
पहला घटक (3) निश्चित है और दूसरा घटक (B) के (2) तत्वों में से चुना जाएगा। ऐसे युग्मों की संख्या (n(B)) होती है।
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