A student earned grades of 84, 78, 84, and 72 on her four regular tests. She earned a grade of 78 on the final exam and 86 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the course grade, the final exam counts for 30%, the project
Counts for 10%, and homework counts for 20%. What is her weighted mean grade? Round to
One decimal place.
A) 81.3
B) 80.2
C) 81.2
D) 82.1

Question

Quizplus · Accepted Answer

The weighted mean grade is calculated by multiplying each component by its weight and summing the results: (84+78+84+72)/4 * 0.4 + 78 * 0.3 + 86 * 0.1 + 87 * 0.2 = 81.2.

A Student Earned Grades of 84, 78, 84, and 72