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

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answer is C.

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Detailed Solution

nM alone=nM-nM∩C-nM∩P+nM∩P∩C=100-28-30+18=60.

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