यदि (|A|=41), (|B|=36) और \(|A\setminus B|=19\), तो \(|A\cup B|\) कितना है?
If (|A|=41), (|B|=36) and \(|A\setminus B|=19\), what is \(|A\cup B|\)?
Explanation opens after your attempt
A. (55)
Concept
Here \(|A\cap B|=41-19=22\), so \(|A\cup B|=41+36-22=55\). Finding the common part first is essential.
Why this answer is correct
The correct answer is A. (55). Here \(|A\cap B|=41-19=22\), so \(|A\cup B|=41+36-22=55\). Finding the common part first is essential.
Exam Tip
\(|A\cap B|=41-19=22\), इसलिए \(|A\cup B|=41+36-22=55\)। पहले सामान्य भाग निकालना आवश्यक है।
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