यदि (n(B)=57) और (n\(A\cap B\)=23) है, तो केवल (B) वाला क्षेत्र कितना होगा?
If (n(B)=57) and (n\(A\cap B\)=23), what is the only (B) region?
Explanation opens after your attempt
A. (34)
Concept
For only (B), (57-23=34). In a Venn diagram, writing the middle part first is helpful.
Why this answer is correct
The correct answer is A. (34). For only (B), (57-23=34). In a Venn diagram, writing the middle part first is helpful.
Exam Tip
केवल (B) के लिए (57-23=34) होगा। वेन आरेख में मध्य भाग पहले लिखना आसान रहता है।
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