SOLUTION: A Student has test scores of 72, 80, 65, 78, and 60. If the final exam counts as one-third of the final grade, what score must the student receive in order to to have a final avera

Question 94796This question is from textbook Fundamentals of Algebra and Trig
: A Student has test scores of 72, 80, 65, 78, and 60. If the final exam counts as one-third of the final grade, what score must the student receive in order to to have a final average of 76? This question is from textbook Fundamentals of Algebra and Trig

Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!
A Student has test scores of 72, 80, 65, 78, and 60. If the final exam counts as one-third of the final grade, what score must the student receive in order to to have a final average of 76?


Let x = the grade on the final exam.

The student's average so far is  =  = .
This 71 will count two-thirds, and the final exam one-third. 

So to find the final grade, we add  two times and  
one time and then divide by .  So,

final grade =  

So we set this equal to 76

 = 

 = 

Multiply both sides by 3

 = 



He or she must make 86 on the final exam to average 76
for the course.

Edwin

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