Question

Self-Check A student scores 82,96,91, and 92 on four college algebra exams.What score is needed on a fifth exam for the student to earn an average grade of 90?

Upper level algebra
ANSWERED
asked 2021-02-25
Self-Check A student scores 82,96,91, and 92 on four college algebra exams.What score is needed on a fifth exam for the student to earn an average grade of 90?

Answers (1)

2021-02-26
Given:
The scores on the four college algebra exams are 82, 96, 91 and 92.
Approach:
Let’s assume that a student needs to score xon the fifth exam.
We will use the following formula for calculating average.
Average=Sum of scores/Number of exams
Calculation:
Average = Sum of scores/Number of exams
\(90=\frac{82+96+91+92+x}{5}\)
\(90=\frac{361+x}{5}\)
\(90\times 5=361=x\)
\(450=361+x\)
x=450-361
x=89
Final Statement
A student needs to score 89 on the fifth college exam.
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