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Question 90
Out of a total of 750 students each student studies at least one of the two subjects, Physics and Mathematics. If 40% of them study Mathematics and 70% study Physics, then the number of students who study both is
Solution
Students who study Physics = 70% of 750 = 525 ... (A)
Students who study Mathematics = 40% of 750 = 300 ... (B)
Total students = (A) + (B) - (Students who study both)
750 = 825 - (Students who study both)
Students studying both subjects = 75
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