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\(n(A) = 54\), \(n(B) = 32\), \(n(C) = 27\), \(n(A \cap B) = 17\), \(n(B \cap C) = 14\), \(n(A \cap C) = 21\), மற்றும் \(n(A \cap B \cap C) = 13\)எனில், கீழ்கண்டவற்றைக் காண்க . \(n(A \cup B \cup C)\).
 
\(n(A \cup B \cup C)\) \(=\) .