यदि \(A=\{1,2\}\), \(B=\{3,4\}\) और \(C=\{4,5,6\}\) हैं, तो (A\times\(B\cup C\)) में कितने अवयव होंगे?
If \(A=\{1,2\}\), \(B=\{3,4\}\) and \(C=\{4,5,6\}\), how many elements are in (A\times\(B\cup C\))?
Explanation opens after your attempt
A. (8)
Concept
\(B\cup C={3,4,5,6}\), so total pairs are \(2\times4=8\). Do not count a common element twice in union.
Why this answer is correct
The correct answer is A. (8). \(B\cup C={3,4,5,6}\), so total pairs are \(2\times4=8\). Do not count a common element twice in union.
Exam Tip
\(B\cup C={3,4,5,6}\), इसलिए कुल युग्म \(2\times4=8\) हैं। संघ में समान अवयव को दो बार न गिनें।
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