Among 500 freshmen pursuing a business degree at a university, 300 are enrolled in an economics course, 245 are enrolled in a mathematics course, and...

Among 500 freshmen pursuing a business degree at a university, 300 are enrolled in an economics course, 245 are enrolled in a mathematics course, and 122 are enrolled in both an economics and a mathematics course. What is the probability that a freshman selected at random from this group is enrolled in each of the following? (Enter your answers to three decimal places.)(a) an economics and/or a mathematics course(b) exactly one of these two courses(c) neither an economics course nor a mathematics course