यदि \(A=\{1,2\}\), \(B=\{2,3\}\) और \(C=\{3,4\}\) हैं, तो (\(A\cup B\)\times C) में कितने अवयव होंगे?
If \(A=\{1,2\}\), \(B=\{2,3\}\) and \(C=\{3,4\}\), how many elements are in (\(A\cup B\)\times C)?
Explanation opens after your attempt
Correct Answer
A. (6)
Concept
\(A\cup B={1,2,3}\), so (n(\(A\cup B\)\times C)=3\times2=6). Do not count a common element twice.
Why this answer is correct
The correct answer is A. (6). \(A\cup B={1,2,3}\), so (n(\(A\cup B\)\times C)=3\times2=6). Do not count a common element twice.
Exam Tip
\(A\cup B={1,2,3}\), इसलिए (n(\(A\cup B\)\times C)=3\times2=6)। समान अवयव को दो बार न गिनें।
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