<p>Percentages for each score: 5: 45.3% 4: 16.5% 3: 18.9% 2: 5.4% 1: 13.9%</p>
<p>BC has a far higher pass rate than AB, probably because people who are bad at math are less likely to take it. </p>
<p>^This, plus the fact that most students take Calc BC seriously, as their schools typically make BC hard for the majority of students. Plus, there is a easy-to-define standard of “exceptional” in classroom math; teachers know exactly what they need to teach for their students to get a 5.</p>