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: [-51.496, 56.177, 55.554, -17.425, -6.185, 3.721]

SOLUTION: 6.724

PROBLEM: [-1.31, 169.522, -26.172, 111.289]

SOLUTION: 63.332

PROBLEM: [195.441, -73.026, -80.726, 91.359, 38.888, -71.239, -10.157, 25.075, 88.499, 0.619]

SOLUTION:
20.473