यदि \(A=\{m,n\}\) और \(B=\{p,q,r\}\) हैं, तो (n\(B\times A\)) कितना है?
If \(A=\{m,n\}\) and \(B=\{p,q,r\}\), what is (n\(B\times A\))?
Explanation opens after your attempt
Correct Answer
D. (6)
Concept
(B) has (3) elements and (A) has (2) elements, so \(3\times 2=6\). Reversing order changes the pairs, not the count.
Why this answer is correct
The correct answer is D. (6). (B) has (3) elements and (A) has (2) elements, so \(3\times 2=6\). Reversing order changes the pairs, not the count.
Exam Tip
(B) में (3) और (A) में (2) तत्व हैं, इसलिए \(3\times 2=6\)। क्रम बदलने से संख्या नहीं, केवल युग्मों का क्रम बदलता है।
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