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: [216.883, -37.346, 67.498, 41.686, 140.857, 195.57]

SOLUTION: 104.191

PROBLEM: [30.224, 63.76, 96.876, 149.052, -38.974, 48.35, 133.493, 142.787, 10.958]

SOLUTION: 70.725

PROBLEM: [1.296, -31.354, 1.25]

SOLUTION:
-9.603