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: [-96.229, 200.453]

SOLUTION: 52.112

PROBLEM: [-53.388, 31.309, 19.079, -16.926, 242.421, 210.599]

SOLUTION: 72.182

PROBLEM: [-60.032, 28.277, 27.543, 171.375, 97.776, -77.308]

SOLUTION:
31.272