A large percentage of students that enter College drop out during their first year.
Even a cursory perusal of the internet will give numbers that indicate the dropout rate is greater for blacks than whites and other ethnic groups. Sad but true.
Only 42 percent of blacks who enter college will complete, versus 62% for whites.
Even with low-standards majors like "black studies" as a fall-back. Only about one quarter of one percent of computer scientists are black.