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      Question

      On the two subjects offered to a class in their final

      year, 32 students in all are studying psychology while a total of 26 students are studying sociology. If 16 students have opted to specialize in both, what is the strength of the class?
      A 74 Correct Answer Incorrect Answer
      B 58 Correct Answer Incorrect Answer
      C 42 Correct Answer Incorrect Answer
      D 48 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Given: Students studying Psychology (P) = 32 Students studying Sociology (S) = 26 Students studying both = 16 We use the formula for union of two sets: Total┬аstudents=P+SтИТBoth =32+26тИТ16 = 42

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