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: [227.874, 175.626, 193.094, 63.963, 139.938]

SOLUTION: 160.099

PROBLEM: [41.308, 149.33, -33.086, -10.268, 209.148, -69.203, -68.646, -82.073, 83.754]

SOLUTION: 24.474

PROBLEM: [7.921, 133.659, 197.849, 201.571]

SOLUTION:
135.25