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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?

  1. 0
  2. 2
  3. 4
  4. 8
in General Aptitude by (21.2k points) 4 29 71
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