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: [-27.872, -9.249, 218.646, -32.0, 49.715, 58.225, 118.489, 29.679, 31.407]

SOLUTION: 48.56

PROBLEM: [-46.113, 125.487, 133.801, 230.957, 217.606, 147.203, -27.73, 66.455, -96.494]

SOLUTION: 83.464

PROBLEM: [-55.198, 36.097, 190.132]

SOLUTION:
57.01