<p>When you say fail, is it after curving? Sometimes 75 can be an A and 65 a B. </p>
<p>My older kid was a math major at Cornell. I still remember getting calls from her about getting in the 70s on her prelims, but ending up with B+/A- for the semester. I know she worked very hard for her grades. She used to go to a lot of office hours. Is your kid doing that?</p>