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?

facas9

facas9

Answered question

2020-10-18

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?

Answer & Explanation

Clelioo

Clelioo

Skilled2020-10-19Added 88 answers

Approach:
Let's assume that a student needs to score x on the fifth exam.
We will use the following formula for calculating average.
Avera≥=Sum of scoresNumber of exams
Calculation:
Avera≥=Sum of scoresNumber of exams
90=82+96+91+92+x5
90=361+x5
90×5=361+x
450=361+x
x=450361
x=89
Final Statement:
A student needs to score 89 on the fifth college exam.

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