यदि (n(A)=10) और (n\(A\cap B\)=4) है, तो (n(A-B)) कितना होगा?
If (n(A)=10) and (n\(A\cap B\)=4), what is (n(A-B))?
Explanation opens after your attempt
C. (6)
Concept
In (A-B), the (4) common elements are removed from (A), so (10-4=6). For difference, count only from the first set.
Why this answer is correct
The correct answer is C. (6). In (A-B), the (4) common elements are removed from (A), so (10-4=6). For difference, count only from the first set.
Exam Tip
(A-B) में (A) से सामान्य (4) अवयव हटते हैं, इसलिए (10-4=6)। अंतर में केवल पहले समुच्चय की गिनती देखें।
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