SOLUTION: My teachers grading scale is a little different.. 120% instead of 100%, I'll explain: Quizzes are 20%, test are 60%, exercises are 10%, and the final is 30%. So when calculating m

Question 818527: My teachers grading scale is a little different.. 120% instead of 100%, I'll explain:
Quizzes are 20%, test are 60%, exercises are 10%, and the final is 30%. So when calculating my average using my quizzes, test, and exercises I have an 88. So what do I need to make on the final to get an 91 in the class?
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
= average of all quizzes
= average of all tests (not including the final)
= average of all exercises
= grade on the final
The average is calculated as

If
and you want ,
that is ,
,
, and
so you want .

In college, I once did that kind of calculation and skipped studying for the final, because I did not need the points. The instructor was not pleased with me. He told me so in no uncertain terms. Fortunately, some time passed until I had to take another course with the same instructor.
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