यदि \(A=\{m,n,o\}\) और \(B=\{7,8\}\) हैं, तो \(A\times B\) के सभी युग्मों में दूसरा घटक (8) कितनी बार आएगा?
If \(A=\{m,n,o\}\) and \(B=\{7,8\}\), how many times will the second component (8) appear in \(A\times B\)?
Explanation opens after your attempt
A. (3)
Concept
The element \(8\in B\) pairs with all (3) elements of (A). Therefore the second component (8) appears (3) times.
Why this answer is correct
The correct answer is A. (3). The element \(8\in B\) pairs with all (3) elements of (A). Therefore the second component (8) appears (3) times.
Exam Tip
\(8\in B\) के साथ (A) के सभी (3) अवयव जुड़ेंगे। इसलिए दूसरा घटक (8) कुल (3) बार आएगा।
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