Quite some time ago I read, about the University of Michigan, that some hispanic and black students get twenty points as opposed to the usual twelve for a perfect exam score on the admissions exam that white or asian students recieve.
But there are other forms of similar bias if you will in the system of course. For example, there are other points awarded, automatically, to students from elite high schools (10 points), students from underrepresented counties in Michigan (6 points) and students that have had parents attending the University of Michigan (4 points). Students who are not elligble to recieve the 20 points for being of underrepresented minority (hispanic and black students) but are of poor socio-economic dwelling, recieves 20 points for being poor.
Then we have different forms of nepotism in this context that 'helps out', like being the child of a professor, faculty member or sponsor/donor, relatives of alumnis' etc.