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BITSAT2013MathematicsSets and RelationsActual

A class has 175 students. The following data shows the number of students obtaining one or more subjects. Mathematics 100 , Physics 70 , Chemistry 40; Mathematics and Physics 30 , Mathematics and Chemistry 28 , Physics and Chemistry 23; Mathematics, Physics and Chemistry 18 . How many students have offered Mathematics alone?

Options

  1. A35
  2. B48
  3. C60
  4. D22

Correct answer

C. 60

Step-by-step solution

aligned & n( M alone ) &=n( M )-n( M C )-n( M P )+n( M C P ) &=100-28-30+18=60 aligned

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