यदि \(A=\{2,3,4\}\) और \(B=\{6\}\) हैं, तो \(B\times A\) में कितने तत्व होंगे?
If \(A=\{2,3,4\}\) and \(B=\{6\}\), how many elements are in \(B\times A\)?
Explanation opens after your attempt
Correct Answer
B. (3)
Concept
(n\(B\times A\)=n(B)n(A)=1\times 3=3). Reversing order does not change the count, but it changes the order of pairs.
Why this answer is correct
The correct answer is B. (3). (n\(B\times A\)=n(B)n(A)=1\times 3=3). Reversing order does not change the count, but it changes the order of pairs.
Exam Tip
(n\(B\times A\)=n(B)n(A)=1\times 3=3)। क्रम बदलने से संख्या नहीं बदलती, पर युग्मों का क्रम बदलता है।
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