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

Multiple Choice

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