यदि (n(A)=25), (n(B)=18), और (n\(A\cap B\)=10), तो केवल (A) में कितने अवयव हैं?
If (n(A)=25), (n(B)=18), and (n\(A\cap B\)=10), how many elements are only in (A)?
Explanation opens after your attempt
C. (15)
Concept
The number only in (A) is (25-10=15). Subtract the common part from total (A).
Why this answer is correct
The correct answer is C. (15). The number only in (A) is (25-10=15). Subtract the common part from total (A).
Exam Tip
केवल (A) की संख्या (25-10=15) है। कुल (A) में से साझा भाग घटाना होता है।
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