In a survey of 500 students in a university, 200 are enrolled in Math, 180 are enrolled in Chemistry, 170 are enrolled in Physics, 40 in Math and Chemistry, 45 in Chemistry and Physics, 50 in Math and Physics, and 15 in all the three courses.  How many students are enrolled in: a. any of the three courses b. Neither of the three courses c. Not in Math or not in Physics d. Not in both Math and Physics e. Physics but not in Math f. Math and either Physics or Chemistry g. Math and Physics or Math

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A: The number of tourist visited any of these three theme parks is calculated as follows:

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