(n\(A\cup B\)=72), (n(A)=46) और (n(B-A)=26) है। (n\(A\cap B\)) कितना होगा?
(n\(A\cup B\)=72), (n(A)=46), and (n(B-A)=26). What is (n\(A\cap B\))?
Explanation opens after your attempt
A. (0)
Concept
\(A\cup B\) contains all of (A) and (B-A), so (46+26=72). Thus the common part is already inside (A), and the extra value is (0).
Why this answer is correct
The correct answer is A. (0). \(A\cup B\) contains all of (A) and (B-A), so (46+26=72). Thus the common part is already inside (A), and the extra value is (0).
Exam Tip
\(A\cup B\) में पूरा (A) और (B-A) शामिल है, इसलिए (46+26=72)। अतः साझा भाग पहले से (A) में है और अतिरिक्त मान (0) निकलता है।
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