SOLUTION: 6. A student has completed 3 exams and has an exam average of 88%. What grade must the student receive on the fourth exam to raise the exam average to be exactly 90%?
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Question 970563: 6. A student has completed 3 exams and has an exam average of 88%. What grade must the student receive on the fourth exam to raise the exam average to be exactly 90%? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Average = total/number
90=total/4
multiply by 4 both sides
360=total
The four scores must total 360.
exam average so far is 88=264/3 exams.
The total through 3 exams is 264
On the 4th exam, the student needs 360-264=96
A grade of 96.
