यदि (|U|=20), (|A|=12), (|B|=9) और \(|A\cap B|=5\), तो (|\(A\cup B\)'|) क्या होगा?
If (|U|=20), (|A|=12), (|B|=9) and \(|A\cap B|=5\), what is (|\(A\cup B\)'|)?
Explanation opens after your attempt
B. (4)
Concept
\(|A\cup B|=12+9-5=16\). The complement has (20-16=4) elements.
Why this answer is correct
The correct answer is B. (4). \(|A\cup B|=12+9-5=16\). The complement has (20-16=4) elements.
Exam Tip
\(|A\cup B|=12+9-5=16\) है। पूरक की संख्या (20-16=4) होगी।
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