यदि (n\(A\cup B\)=75), (n\(A\cap B\)=18) और (n(A)=46) है, तो (n(B)) कितना है?
If (n\(A\cup B\)=75), (n\(A\cap B\)=18), and (n(A)=46), then what is (n(B))?
Explanation opens after your attempt
A. (47)
Concept
Using the formula, (75=46+n(B)-18). Hence (n(B)=47).
Why this answer is correct
The correct answer is A. (47). Using the formula, (75=46+n(B)-18). Hence (n(B)=47).
Exam Tip
सूत्र से (75=46+n(B)-18) मिलेगा। इसलिए (n(B)=47) है।
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