Just like in a city urban center that is predominantly black, but the police, judges, city council and mayor are all predominantly white.
Number of people does not necessarily equal power.
https://chronicle.com/article/Who-Are-College-Presidents-/13...
There are probably also interesting conversations to have about why men are graduating college less than women, particularly black men, who attend college at a rate much lower than any other demographic in the US, including black women. It's tempting to make it "us against them" (no matter who the "us" is), but, it's probably not useful except for the most powerful (who do tend to be white and male, though not all white males fit into that category).
What does this mean and where is the actual documentary evidence to back it up (assuming that whatever it means would need such things)?