Course selection Students at an expensive liberal arts col lege may take courses at a nearby public university at no additional charge.

One of their professors tells them that it would make no sense to do so, since they would be losing the money they paid for tuition at the more pricey col lege. Given that a student has already paid tuition at the liberal arts college, but judges that the course offerings at the public university are better for her, where should she sign up? Explain.