यदि \(A\cap B=B\cap C=C\cap A=\varnothing\), (n(A)=12), (n(B)=15), (n(C)=18), तो (n\(A\cup B\cup C\)) क्या है?
If \(A\cap B=B\cap C=C\cap A=\varnothing\), (n(A)=12), (n(B)=15), (n(C)=18), what is (n\(A\cup B\cup C\))?
Explanation opens after your attempt
A. (,45,)
Concept
The three sets are pairwise disjoint, so the union count is the direct sum. (12+15+18=45).
Why this answer is correct
The correct answer is A. (,45,). The three sets are pairwise disjoint, so the union count is the direct sum. (12+15+18=45).
Exam Tip
तीनों समुच्चय परस्पर असंबद्ध हैं, इसलिए संघ की संख्या सीधा योग है। (12+15+18=45)।
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