यदि (n(U)=70), बाहर का क्षेत्र (12), केवल (A) (18), और केवल (B) (20) है, तो (n\(A\cap B\)) क्या है?
If (n(U)=70), the outside region is (12), only (A) is (18), and only (B) is (20), what is (n\(A\cap B\))?
Explanation opens after your attempt
A. (20)
Concept
The common part is (70-12-18-20=20). To get an unknown region in a Venn diagram, subtract known regions from the total.
Why this answer is correct
The correct answer is A. (20). The common part is (70-12-18-20=20). To get an unknown region in a Venn diagram, subtract known regions from the total.
Exam Tip
साझा भाग (70-12-18-20=20) होगा। वेन आरेख में अज्ञात क्षेत्र पाने के लिए कुल से ज्ञात क्षेत्र घटाएं।
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