Question

Grading Scale 1 has the following weights- (Tests- 50% Quiz- 25% Homework- 15% Final Exam- 10%). Calculate your final average if your performance in the class is as follows- Test Grades- 78 Quiz- 87 Homework- 80 Final Exam- 90.

a. 78(50) + 87(25) + 80(15) + 90(10) = X

b. 78(.50) + 87(.25) + 80(.15) + 90(.10) = X

c. 78(5) + 87(2.5) + 80(1.5) + 90(.10) = X

d. 78(50) + 87(.25) + 80(1.5) + 90(.10) = X

Answer 1

78(0.50)+87(0.25)+80(0.15)+90(0.10)=x

Explanation:

Let

x-----> the final average

we know that

To find the final average multiply each performance by its weight in decimal and then sum the results

x=78(0.50)+87(0.25)+80(0.15)+90(0.10)

x=39+21.75+12+9

x=81.75