Answer:
The weighted mean grade is 81.2%.
Step-by-step explanation:
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%.
So, weighted mean grade can be calculated as :
[tex]0.4\times ((84+78+84+72)/4)+(0.3\times 78)+(0.1\times 86)+(0.2\times 87)[/tex]
=>[tex](0.4\times79.5)+23.4+8.6+17.4[/tex]
=> [tex]31.8+23.4+8.6+17.4[/tex] = 81.2
Therefore, the weighted mean grade is 81.2%.
