यदि (n(A)=18), (n(B)=14) और (n\(A\cap B\)=6), तो (n\(A\cup B\)) क्या है?
If (n(A)=18), (n(B)=14), and (n\(A\cap B\)=6), what is (n\(A\cup B\))?
Explanation opens after your attempt
A. (26)
Concept
Use (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)). Thus (18+14-6=26).
Why this answer is correct
The correct answer is A. (26). Use (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)). Thus (18+14-6=26).
Exam Tip
सूत्र (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)) लगाइए। इसलिए (18+14-6=26)।
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