SOLUTION: Groucho has the following test scores: 95%, 91%, 86%, and 92%. What score does he need to earn on his last test to finish with a 91% average?
I've tried to set it up in a propor
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-> SOLUTION: Groucho has the following test scores: 95%, 91%, 86%, and 92%. What score does he need to earn on his last test to finish with a 91% average?
I've tried to set it up in a propor
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Question 817854: Groucho has the following test scores: 95%, 91%, 86%, and 92%. What score does he need to earn on his last test to finish with a 91% average?
I've tried to set it up in a proportion, but I keep getting like 300. Can you help? Found 2 solutions by TimothyLamb, richwmiller:Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! (95 + 91 + 86 + 92 + f)/5 = 91
(364 + f)/5 = 91
364 + f = 91*5
364 + f = 455
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f = 91
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answer:
he needs 91% on the final to get a class score of 91%
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You can put this solution on YOUR website! two ways to look at it.
Here's one
let's look at the scores he has so far
95 91 86 92
+4 0 -5 +1
add up the differences =0
He needs 91 because he already has a 91 average
the other tutor gave you the algebra for it
