एक सर्वे में (n(U)=150), (n(A)=70), (n(B)=62) और (n(\(A\cup B\)^c)=32) है। (n\(A\cap B\)) कितना होगा?
In a survey (n(U)=150), (n(A)=70), (n(B)=62), and (n(\(A\cup B\)^c)=32). What is (n\(A\cap B\))?
Explanation opens after your attempt
Correct Answer
B. (14)
Concept
First (n\(A\cup B\)=150-32=118), then (n\(A\cap B\)=70+62-118=14). If the outside part is given, find the union first.
Why this answer is correct
The correct answer is B. (14). First (n\(A\cup B\)=150-32=118), then (n\(A\cap B\)=70+62-118=14). If the outside part is given, find the union first.
Exam Tip
पहले (n\(A\cup B\)=150-32=118), फिर (n\(A\cap B\)=70+62-118=14)। बाहर का भाग दिया हो तो पहले संघ निकालें।
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