Lesson 1 · Cardinality of Three Sets

Cardinality of Three Sets

MathematicsSubject

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Question 1 of 12

1If \( n(A) = 20 \), \( n(B) = 18 \), \( n(C) = 15 \), \( n(A \cap B) = 7 \), \( n(B \cap C) = 5 \), \( n(A \cap C) = 6 \) and \( n(A \cap B \cap C) = 3 \), what is \( n(A \cup B \cup C) \)?