यदि (n(A)=11), (n(B)=9), और (n\(A\cap B\)=4), तो केवल (A) और केवल (B) की कुल संख्या क्या है?
If (n(A)=11), (n(B)=9), and (n\(A\cap B\)=4), what is the total number of only (A) and only (B)?
Explanation opens after your attempt
B. (12)
Concept
Only (A=11-4=7) and only (B=9-4=5). Therefore, the total is (7+5=12).
Why this answer is correct
The correct answer is B. (12). Only (A=11-4=7) and only (B=9-4=5). Therefore, the total is (7+5=12).
Exam Tip
केवल (A=11-4=7) और केवल (B=9-4=5) है। इसलिए कुल (7+5=12)।
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