<p>You go talk to the professor in charge of the class and maybe the Dean and present your background and make a case. Not all rules are cast in stone–especially things like this. Many state business schools mix undergrads and grads in upper level classes. Sometimes the class will have an undergrad number and a grad number for the same class. Also a little secret–most undergrad classes have tougher grading than grad classes. A C in undergrad is a B in grad school.</p>