http://interval.louisiana.edu/courses/555/555grade.html

Math. 555 Grading Policy

We may or may not have a midterm and final exam, separate from the assignments.  If we do, then the grades will be computed as follows.
         Assignments:  65%
         Midterm:      15%
         Final Exam:   20%
You may estimate your letter grade from
         90%-100% = "A";
         80%-89%  = "B";
         65%-79%  = "C";
         50%-65%  = "D";
         <50%     = "F".