एक वेन आरेख में (n(U)=180), (n(A)=92), (n(B)=84) और (n(\(A\cup B\)^c)=38) हैं। (n\(A\cap B\)) कितना होगा?
In a Venn diagram (n(U)=180), (n(A)=92), (n(B)=84), and (n(\(A\cup B\)^c)=38). What is (n\(A\cap B\))?
Explanation opens after your attempt
B. (34)
Concept
First (n\(A\cup B\)=180-38=142), then (n\(A\cap B\)=92+84-142=34). If the outside region is given, find the union first.
Why this answer is correct
The correct answer is B. (34). First (n\(A\cup B\)=180-38=142), then (n\(A\cap B\)=92+84-142=34). If the outside region is given, find the union first.
Exam Tip
पहले (n\(A\cup B\)=180-38=142), फिर (n\(A\cap B\)=92+84-142=34)। बाहर का भाग दिया हो तो पहले संघ निकालें।
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