यदि (n(A)=55), (n(B)=62), (n(A-B)=23) है, तो (n\(A\cup B\)) कितना है?
If (n(A)=55), (n(B)=62), (n(A-B)=23), then what is (n\(A\cup B\))?
Explanation opens after your attempt
A. (85)
Concept
(n\(A\cap B\)=55-23=32), so (n\(A\cup B\)=55+62-32=85). First find the common part and then the union.
Why this answer is correct
The correct answer is A. (85). (n\(A\cap B\)=55-23=32), so (n\(A\cup B\)=55+62-32=85). First find the common part and then the union.
Exam Tip
(n\(A\cap B\)=55-23=32), इसलिए (n\(A\cup B\)=55+62-32=85) है। पहले साझा भाग खोजें फिर संघ निकालें।
Login to save your score, XP, coins and progress.
