यदि (n(U)=95), (n(A')=47), (n(B')=52) और (n\(A\cap B\)=18) है, तो (n\(A\cup B\)) का सही मान चुनें।
If (n(U)=95), (n(A')=47), (n(B')=52) and (n\(A\cap B\)=18), choose the correct value of (n\(A\cup B\)).
Explanation opens after your attempt
A. (73)
Concept
(n(A)=48), (n(B)=43), so (n\(A\cup B\)=48+43-18=73). First obtain the original set sizes from complements.
Why this answer is correct
The correct answer is A. (73). (n(A)=48), (n(B)=43), so (n\(A\cup B\)=48+43-18=73). First obtain the original set sizes from complements.
Exam Tip
(n(A)=48), (n(B)=43), इसलिए (n\(A\cup B\)=48+43-18=73) है। पूरक से मूल समुच्चय निकालना पहला कदम रखें।
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