Forty students watched films A, B and C over a week. Each student watched either only one film or all three. Thirteen students

Question

Forty students watched films A, B and C over a week. Each student watched either only one film or all three. Thirteen students watched film A, sixteen students watched film B and nineteen students watched film C. How many students watched all three films?
(A) 0
(B) 2
(C) 4
(D) 8

Kunduz · Accepted Answer

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