$n(A \cup B \cup C)$ = ?

Question

Accepted Answer

$n(A) + n(B) + n(C) - n(A \cap B) - n(B \cap C) - n(C \cap A) + n(A \cap B \cap C)$

Answer

$n(A) + n(B) + n(C)$

Answer

$n(A) + n(B) + n(C) - n(A \cap B) - n(B \cap C) - n(C \cap A)$

Answer

$n(A) + n(B) + n(C) + n(A \cap B \cap C)$

n(A∪B∪C)n(A \cup B \cup C)n(A∪B∪C) = ?