यदि (n(U)=150), (n(A)=70), (n(B)=65) और (n\(A\cap B\)=28) है, तो (n(\(A\cup B\)')) कितना है?
If (n(U)=150), (n(A)=70), (n(B)=65) and (n\(A\cap B\)=28), then what is (n(\(A\cup B\)'))?
Explanation opens after your attempt
A. (43)
Concept
First (n\(A\cup B\)=70+65-28=107), so the outside part is (150-107=43). Remember to subtract from the universal set for a complement.
Why this answer is correct
The correct answer is A. (43). First (n\(A\cup B\)=70+65-28=107), so the outside part is (150-107=43). Remember to subtract from the universal set for a complement.
Exam Tip
पहले (n\(A\cup B\)=70+65-28=107), इसलिए बाहर का भाग (150-107=43) है। पूरक निकालते समय सार्वत्रिक समुच्चय घटाना याद रखें।
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