यदि (|A|=28), (|B|=35) और \(|A\cup B|=50\) है, तो \(|A\setminus B|\) कितना होगा?
If (|A|=28), (|B|=35) and \(|A\cup B|=50\), what is \(|A\setminus B|\)?
Explanation opens after your attempt
Correct Answer
B. (13)
Concept
Here \(|A\cap B|=28+35-50=13\), so \(|A\setminus B|=28-13=15\). Always find the intersection before the difference.
Why this answer is correct
The correct answer is B. (13). Here \(|A\cap B|=28+35-50=13\), so \(|A\setminus B|=28-13=15\). Always find the intersection before the difference.
Exam Tip
\(|A\cap B|=28+35-50=13\), इसलिए \(|A\setminus B|=28-13=15\) नहीं बल्कि (15) है। पहले प्रतिच्छेद निकालना न भूलें।
Login to save your score, XP, coins and progress.