Find the Weighted Average

Multiple Choice

Find the weighted average.
-A student earned grades of 87, 81, 72, and 92 on her four regular tests. She earned a grade of 79 on the final exam and 85 on her class projects. Her combined homework grade was 88. 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) 83.0
B) 83.4
C) 82.5
D) 83.9