How do math professors calculate grades?

<p>I finished my math final on monday and was wondering how math professors calculate grades. How do they calculate grades?If the class averages were 50 for both midterms and i got 48 and 39, will i be able to pass the class? Oh and my math professor gives the option to drop one midterm if you do good on the final, which was extremely hard. Btw i have professor Calin.</p>

<p>Top 50% students gets As and Bs. Most of bottom 50% half get Cs.</p>