Summary Exam Weight Median Maximum Minimum Range
Exam 1 20% 73.0 100.0 56.0 44.0
Exam 2 20% 83.5 99.0 61.0 38.0
Exam 3 20% 85.5 98.0 67.0 31.0
HW 10% 86.0 100.0 70.0 30.0
Final Exam 30% 80.0 99.0 51.0 48.0
Overall 100% 81.6 90.4 67.6 22.8
Extra Credit 1%


How I get theses Overall values?
thanks in advance