Grading scale 2 has the following weights- tests- 60% quiz- 15% homework- 10% final exam- 15% what do you need to score on the final exam to make an 78 in the class if your grades are- show steps. test grades- 85 quiz- 87 homework- 68 final exam- ? ? a. 85(60) + 87(15) + 68(10) + x(15) = 78 x = 49.33 b. 85(6.0) + 87(1.5) + 68(1.0) + x(1.5) = 78 x = 53.62 c. 85(.60) + 87(.15) + 68(.10) + x(.15) = 78 x = 47.67 d. 85(.60) + 87(1.5) + 68(.10) + x(1.5) = 78 x = 35.59