TASK DEFINITION: In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.
PROBLEM: [-38.715, 205.647, 66.034, 49.8, -92.051, 111.017, 149.689]

SOLUTION: 64.489

PROBLEM: [-2.425, -41.007, 142.975, 117.593, 142.875, -69.307, -38.932, 92.631, 158.921, 87.117]

SOLUTION: 59.044

PROBLEM: [-50.687, -80.68]

SOLUTION:
-65.684