What is the relative success rate of ethnic groups who are accepted into the elite schools? If (making up numbers) 90-100% of Asians who are accepted into the s

What is the relative success rate of ethnic groups who are accepted into the elite schools? If (making up numbers) 90-100% of Asians who are accepted into the school graduate, vs (again making up numbers) 40-50% of blacks/latinos/whites, that points to the entrance requirements (including exams) being a decent predictor of success; in that case, it should be less about messing with the entrance requirements and strengthening the support structure for other demographics. If the numbers are flipped (a significant number of Asians get in but don't graduate, and vice versa for the other demographics) that points to something being wrong with the entrance requirements and those requirements should be re-evaluated.