यदि \(A=\{0,2,4\}\) और \(B=\{1,3,5,7\}\) हैं, तो \(A\times B\) में पहले घटक (4) वाले कितने युग्म होंगे?
If \(A=\{0,2,4\}\) and \(B=\{1,3,5,7\}\), how many pairs in \(A\times B\) have first component (4)?
Explanation opens after your attempt
B. (4)
Concept
When the first component (4) is fixed, the second component can be any of the (4) elements of (B). Hence (4) pairs are formed.
Why this answer is correct
The correct answer is B. (4). When the first component (4) is fixed, the second component can be any of the (4) elements of (B). Hence (4) pairs are formed.
Exam Tip
पहला घटक (4) तय होने पर दूसरा घटक (B) के (4) अवयवों में से कोई भी हो सकता है। इसलिए (4) युग्म बनते हैं।
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