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.
:
Find the reg grade average
r = {{{(78+78+91+91)/4}}}
r = 84.5 reg grade average
:
Mean grade
mg = {{{(4(84.5)+3(78)+87+2(87))/10}}}
:
mg = {{{(338+234+87+174)/10}}}
:
mg = {{{833/10}}}
mg = 83.3% is the weighted mean grade