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      Question

       In a class, 40 like coffee, 50 like tea, 20 like both.

      Find number of students who like neither if total is 100.
      A 80 Correct Answer Incorrect Answer
      B 20 Correct Answer Incorrect Answer
      C 70 Correct Answer Incorrect Answer
      D 30 Correct Answer Incorrect Answer

      Solution

      ATQ,

      |C∪T| = 40 + 50 − 20 = 70.

      Neither = 100 − 70 = 30.

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