यदि \(A=\{1,2,3\}\), \(B=\{4,5\}\) और \(C=\{5,6\}\) हैं, तो (\(A\times B\)\cup\(A\times C\)) की कार्डिनलिटी क्या है?
If \(A=\{1,2,3\}\), \(B=\{4,5\}\), and \(C=\{5,6\}\), what is the cardinality of (\(A\times B\)\cup\(A\times C\))?
Explanation opens after your attempt
C. (9)
Concept
(\(A\times B\)\cup\(A\times C\)=A\times\(B\cup C\)), and \(B\cup C={4,5,6}\). Thus there are \(3\cdot3=9\) elements.
Why this answer is correct
The correct answer is C. (9). (\(A\times B\)\cup\(A\times C\)=A\times\(B\cup C\)), and \(B\cup C={4,5,6}\). Thus there are \(3\cdot3=9\) elements.
Exam Tip
(\(A\times B\)\cup\(A\times C\)=A\times\(B\cup C\)) और \(B\cup C={4,5,6}\)। इसलिए \(3\cdot3=9\) अवयव हैं।
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