यदि (n(A)=31), (n(B)=22), और (n\(A\cap B\)=9), तो (n\(A\cup B\)) क्या है?
If (n(A)=31), (n(B)=22), and (n\(A\cap B\)=9), what is (n\(A\cup B\))?
Explanation opens after your attempt
A. (44)
Concept
(n\(A\cup B\)=31+22-9=44). The common part is subtracted once to avoid double counting.
Why this answer is correct
The correct answer is A. (44). (n\(A\cup B\)=31+22-9=44). The common part is subtracted once to avoid double counting.
Exam Tip
(n\(A\cup B\)=31+22-9=44)। साझा भाग को दो बार गिनने से बचाने के लिए एक बार घटाते हैं।
Login to save your score, XP, coins and progress.
