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