How many points do you need on the final to average 75?

Question
Upper level algebra
asked 2021-01-07
How many points do you need on the final to average 75?

Answers (1)

2021-01-08
Your grades in the three tests in College Algebra are 87, 59 and 73.
Calculation:
Let x = the final test grade
Average of four grades = 75
Therefore, \(\frac{87+59+73+x}{4}=75\)
\(\frac{219+x}{4}=75\)
\(219 +x = 300\)
\(x=81\)
Hence, the final test grade is 81.
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