यदि (n(A)=35) और (n\(A\cap B\)=12), तो केवल (A) में कितने अवयव होंगे?
If (n(A)=35) and (n\(A\cap B\)=12), how many elements will be only in (A)?
Explanation opens after your attempt
B. (23)
Concept
The number only in (A) is (35-12=23). Subtract the common part from total (A).
Why this answer is correct
The correct answer is B. (23). The number only in (A) is (35-12=23). Subtract the common part from total (A).
Exam Tip
केवल (A) की संख्या (35-12=23) है। कुल (A) से साझा भाग घटाएं।
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