यदि (n(B)=14) और (n\(A\cap B\)=5), तो केवल (B) में कितने अवयव होंगे?
If (n(B)=14) and (n\(A\cap B\)=5), how many elements are only in (B)?
Explanation opens after your attempt
B. (9)
Concept
The number only in (B) is (14-5=9). In the Venn diagram, subtract the middle part from (B).
Why this answer is correct
The correct answer is B. (9). The number only in (B) is (14-5=9). In the Venn diagram, subtract the middle part from (B).
Exam Tip
केवल (B) की संख्या (14-5=9) होगी। वेन आरेख में (B) से बीच वाला भाग घटाएं।
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