SOLUTION: A student earned grades of 78, 78, 91, and 91 on her first four regular tests. She earned a grade of 78 on the final exam and 87 on her class projects. Her combined homework grade

Algebra ->  Average -> SOLUTION: A student earned grades of 78, 78, 91, and 91 on her first four regular tests. She earned a grade of 78 on the final exam and 87 on her class projects. Her combined homework grade       Log On


   

Question 621242: A student earned grades of 78, 78, 91, and 91 on her first four regular tests. She earned a grade of 78 on the final exam and 87 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 point.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A student earned grades of 78, 78, 91, and 91 on her first four regular tests.
She earned a grade of 78 on the final exam and 87 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 point.
:
Find the reg grade average
r = %2878%2B78%2B91%2B91%29%2F4
r = 84.5 reg grade average
:
Mean grade
mg = %284%2884.5%29%2B3%2878%29%2B87%2B2%2887%29%29%2F10
:
mg = %28338%2B234%2B87%2B174%29%2F10
:
mg = 833%2F10
mg = 83.3% is the weighted mean grade