How to do calculate a grade?
I really had no clue where to put this question so I put it here since I guess it has to do with programming.
Say I these marks
Mark = 80
OutOff = 100
Weight(how much is the assignment worth to your overall grade) = 50 (in this case it is worth half of the possible 100%)
Mark = 50
OutOff = 50
Weight = 30
So 80% of the possible 100% has been given out in this given course. This means what ever else is given in this course cannot total more then 20%
so my OverallMark right now would be
A = (80/100) * 50 = 40
B = (50/50) * 30 = 30
C = (A + B) / 100 = 70
OverAllMakrk = 70%
Current Mark = 70/80 = 87.5%
Now my problem is when I add it differently I get different totals. I don't know which way is now right and how I can get them both to have the same mark.
What I tried
80 + 50 = 130
100 + 50 = 150
130/150 * (50 + 30) = 69.33333 OverallGrade .67% 0ff(but this does not include that unknown 20%).
So I am not sure how to factor that in. Yet I don't know if it is my example or what because it is pretty close but still almost 1% difference is major since it can mean the difference between a "A" and B" or a "pass" or "fail"
Then I tried current Mark
69.3333 / 80 = 86.67% difference of .83%
So is there away I can close this gap? Is all this caused just by rounding?
Since it will make my life alot easier when programing if I can just total everything up rather then having to do it one by one.