यदि (|A|=12), (|B|=18), (|C|=20), \(|A\cap B|=5\), \(|B\cap C|=7\), \(|C\cap A|=4\), \(|A\cap B\cap C|=2\), तो \(|A\cup B\cup C|\) क्या है?
If (|A|=12), (|B|=18), (|C|=20), \(|A\cap B|=5\), \(|B\cap C|=7\), \(|C\cap A|=4\), \(|A\cap B\cap C|=2\), what is \(|A\cup B\cup C|\)?
Explanation opens after your attempt
A. (36)
Concept
Here \(|A\cup B\cup C|=12+18+20-5-7-4+2=36\). For three sets, remember to add the triple intersection at the end.
Why this answer is correct
The correct answer is A. (36). Here \(|A\cup B\cup C|=12+18+20-5-7-4+2=36\). For three sets, remember to add the triple intersection at the end.
Exam Tip
\(|A\cup B\cup C|=12+18+20-5-7-4+2=36\) है। तीन सेटों में अंतिम \(+|A\cap B\cap C|\) जोड़ना याद रखें।
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