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

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