SOLUTION: if i took four quizzes and there score averages out to an 82, what do i have to get on the next quiz to get it to average to an 85

Question 513918: if i took four quizzes and there score averages out to an 82, what do i have to get on the next quiz to get it to average to an 85
Found 2 solutions by stanbon, Earlsdon:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if i took four quizzes and there score averages out to an 82, what do i have to get on the next quiz to get it to average to an 85
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Total points from the 4 quizzes: 4*82 = 328
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Equation:
(328+x)/5 = 85
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328 + x = 415
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x = 87
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Cheers,
Stan H.
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Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
First, let's find the sum of your four quizzes (a+b+c+d):
The average of the first four quizzes is 82.
Now let's call the score on your fifth quiz, x, so...
Multiply by 5.
Subtract 328.

You will need to get 97 on your next quiz to attain an overall average of 85.
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