SOLUTION: In a college Algebra class, the final exam is 20% of the course grade. If Greg's regular exam scores are 80,64,88,92 and 85. What does he need on the final exam to make a B(80%) in

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Question 97655: In a college Algebra class, the final exam is 20% of the course grade. If Greg's regular exam scores are 80,64,88,92 and 85. What does he need on the final exam to make a B(80%) in the course
Answer by ankor@dixie-net.com(12701) (Show Source):
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n a college Algebra class, the final exam is 20% of the course grade. If Greg's regular exam scores are 80,64,88,92 and 85. What does he need on the final exam to make a B(80%) in the course
:
Find the average of the 5 previous grades;
= 81.8
:
Previous average is 4/5 and the final is 1/5 of the course grade
:
= 80
:
= 80
:
327.2 + x = 5(80)
:
327.2 + x = 400
:
x = 400 - 327.2
:
x = 72.8 % will maintain an 80% average