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Professor N. Timmy Date has 28 students in his Calculus class and 20 students in his...

Professor N. Timmy Date has 28 students in his Calculus class and 20 students in his Discrete Mathematics class.

(a) Assuming that there are no students who take both classes, how many students does Professor Date have?

(b) Assuming that there are five students who take both classes, how many students does Professor Date have?

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