Answer:
In the next test John must get [tex]79[/tex]
Step-by-step explanation:
Let
x------> the score in the next test
we know that
The formula to calculate the mean is the sum of the scores divided by the number of test
so
[tex]76=\frac{75+82+66+78+x}{5}[/tex]
Solve for x
[tex]76=\frac{301+x}{5}\\ \\x=76*5-301\\ \\x=79[/tex]
