A Student Earned Grades of 74, 75, 79, and 91

Multiple Choice

A student earned grades of 74, 75, 79, and 91 on her four regular tests. She earned a grade of 75 on the final exam and 84 on her class projects. Her combined homework grade was 86. The fou 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) 80.6
B) 80.0
C) 81.1
D) 80.5