<p>This should help:</p>
<p><a href=“Office of Institutional Research | Brown University”>Office of Institutional Research | Brown University;
<p>Find “Percentage Distribution of Undergraduate Grades by Area: Selected Years.”</p>
<p>Since 46.7% of students received As last year, and at least 22% of those courses were taken S/NC, over half of all grades given in classes taken with the A/B/C option were As. In Humanities, it seems that about 70% of all A/B/C classes result in an A.</p>