Question

Emily has the following grades in his math class: Homework grades: 80, 100, 90, Quiz grades: 84, 90, 72, Test grades: 64,

72. If the teacher weights Homework at 10%, Quizzes at 25%, Tests at 45%, what is her current class average? Be careful
with this one, the categories do not sum to 100% because she has not taken her final exam yet.
60
72
75
82

Answer 1

75

Explanation:

Homework mean x 10%: (80+100+90)/3 x 0.1 = 90 x 0.1 = 9

Quiz mean x 25%: (84+90+72)/3 x 0.25 = 20.5

Test mean x 45%: (64+72)/2 x 0.45 = 30.6

Sum of means/percentage of grade: 9 + 20.5 + 30.6 = 60.1/.8 = 75.125