यदि (n(A)=14), (n(B)=10), और (n\(A\cap B\)=3), तो (n\(A\cup B\)) क्या है?
If (n(A)=14), (n(B)=10), and (n\(A\cap B\)=3), what is (n\(A\cup B\))?
Explanation opens after your attempt
B. (21)
Concept
(n\(A\cup B\)=14+10-3=21). In union, the common part is subtracted once.
Why this answer is correct
The correct answer is B. (21). (n\(A\cup B\)=14+10-3=21). In union, the common part is subtracted once.
Exam Tip
(n\(A\cup B\)=14+10-3=21)। संघ में साझा भाग को एक बार घटाते हैं।
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