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: [149.806, 232.621, 119.06]

SOLUTION: 167.162

PROBLEM: [51.02, -71.125, 178.19, -7.234, -99.571, -17.215]

SOLUTION: 5.677

PROBLEM: [-12.877, -18.405, 190.095]

SOLUTION:
52.938