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In a class, there are 200 students in which 120 take Mathematics, 90 take Physics, 60 take Chemistry, 50 take Mathematics and Physics, 50 take Mathematics and Chemistry, 43 take Physics and Chemistry and 38 take Mathematics, Physics and Chemistry. Then the number of students who have taken exactly one subject is

Answer» In a class, there are 200 students in which 120 take Mathematics, 90 take Physics, 60 take Chemistry, 50 take Mathematics and Physics, 50 take Mathematics and Chemistry, 43 take Physics and Chemistry and 38 take Mathematics, Physics and Chemistry. Then the number of students who have taken exactly one subject is


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