A class has 175 students. The following table shows the number of students studying one or more of the following subjects in this case
Subjects No. of students
Mathematics 100
Physics 70
Chemistry 46
Mathematics and Physics 30
Mathematics and Chemistry 28
Physics and Chemistry 23
None of 3 subjects 22
1)Find how many students study all the Three subjects?
2)Find how many students study exactly 1 subject ?