Solve the Problem. -A Student Earned Grades of 84, 78, 84, and 72

Multiple Choice

Solve the problem.
-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 final 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) 80.2
B) 81.3
C) 81.2
D) 82.1