यदि (n(A)=31), (n(B)=28) और (n\(A\cup B\)=46) है, तो (n\(A\cap B\)) कितना है?
If (n(A)=31), (n(B)=28), and (n\(A\cup B\)=46), what is (n\(A\cap B\))?
Explanation opens after your attempt
A. (13)
Concept
By the formula, (n\(A\cap B\)=31+28-46=13). When union is given, find the common part using this formula.
Why this answer is correct
The correct answer is A. (13). By the formula, (n\(A\cap B\)=31+28-46=13). When union is given, find the common part using this formula.
Exam Tip
सूत्र से (n\(A\cap B\)=31+28-46=13) है। संघ दिया हो तो सामान्य भाग इसी सूत्र से निकालें।
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