there are 60 students in a math class & 90 students in physics class.find the no.of students which are either in physics class or math class in the following cases
1. two classes meet at the same hr.
2. two classes meet at different hrs. and 30 students are enrolled in both the courses
3. what value is shown here?

Dear Student,

Please refer the following link for answer to similar query.

https://www.meritnation.com/ask-answer/question/there-are-40-students-in-chemistry-class-and-60-students-in/sets/7589357

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