यदि (n(A)=52), (n(B)=47) और (n\(A\cup B\)=79) है, तो (n\(A\cap B\)) कितना है?
If (n(A)=52), (n(B)=47), and (n\(A\cup B\)=79), what is (n\(A\cap B\))?
Explanation opens after your attempt
B. (20)
Concept
(n\(A\cap B\)=52+47-79=20). When the union is given, subtract it from the sum of both sets.
Why this answer is correct
The correct answer is B. (20). (n\(A\cap B\)=52+47-79=20). When the union is given, subtract it from the sum of both sets.
Exam Tip
(n\(A\cap B\)=52+47-79=20) होगा। संघ दिया हो तो प्रतिच्छेद के लिए दोनों समुच्चयों का योग घटाएं।
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