The paywall hid the second part of the article... but, if the exams are the same for all, and graded the same, and top X students get accepted, just by looking

The paywall hid the second part of the article... but, if the exams are the same for all, and graded the same, and top X students get accepted, just by looking at exam scores, any demographic irregularities are to be blamed on previous education of students with bad scores, and not the selective school, which only accepts the best students.