Add the grades of Exam 1 (0-155pts) and Exam 2(0-333pts) and
the two homeworks (15pts each).
Let G= Exam1 + Exam 2 + HW1 +HW2 (155+333+15+15=518; 518/2=259).
 
 A    range : 450-518
 B/B+ range : 345-450
 C/C+ range : 259-345
 F    range :  0 -258

[Boundaries possibly overlapping]

 Tue Oct 23, 2018 @ 9:14am