(n(U)=95), (n(A')=47), (n(B')=52) और (n\(A\cap B\)=18) है। (n\(A\cup B\)) कितना है?
(n(U)=95), (n(A')=47), (n(B')=52) and (n\(A\cap B\)=18). What is (n\(A\cup B\))?
Explanation opens after your attempt
A. (66)
Concept
(n(A)=95-47=48) and (n(B)=95-52=43), so the union is (48+43-18=73), not (66). Recheck the formula before matching options.
Why this answer is correct
The correct answer is A. (66). (n(A)=95-47=48) and (n(B)=95-52=43), so the union is (48+43-18=73), not (66). Recheck the formula before matching options.
Exam Tip
(n(A)=95-47=48) और (n(B)=95-52=43), इसलिए संघ (48+43-18=73) नहीं बल्कि (73) है। विकल्पों से मिलान करते समय सूत्र दोबारा देखें।
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