SOLUTION: A student in the ACE biology class wants to get at least 85% in the course. She has test marks of 60%, 90%, 78% and 89%. What test mark would she have to get on the last test, and

Question 998217: A student in the ACE biology class wants to get at least 85% in the course.
She has test marks of 60%, 90%, 78% and 89%. What test mark would she have to get on the last test, and is this possible? Explain.
Found 2 solutions by solver91311, addingup:
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

If an 85 average is needed, then the total number of points scored must be 85 times the total number of tests, 5 in this case. The required score to achieve the 85 average is 85 times 5 minus the sum of the scores already achieved. In this case, you can't get there from here.

John

My calculator said it, I believe it, that settles it

Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
(60+90+78+89+x)/5= 85
317+x)/5= 85
317+x= 425
x= 108
She'd have to get 108 in her last exam. Good luck with that!
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