Among 500 freshman pursuing a business degree at a university, 338 are enrolled in an economics course, 231 are enrolled in a mathematics course, and...

Among 500 freshman pursuing a business degree at a university, 338 are enrolled in an economics course, 231 are enrolled in a mathematics course, and 150 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 an economics and/or a mathematics course