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: [108.822, 139.139, 130.938, 100.996, 155.361, 8.752, 221.639, -12.877]

SOLUTION: 106.596

PROBLEM: [95.725, 112.04, 231.963]

SOLUTION: 146.576

PROBLEM: [204.634, 176.221, 167.577, 217.281, 38.905, -60.3, -17.617, -69.258, -5.581]

SOLUTION:
72.429