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: [-31.252, 246.934, 96.512, 19.356, -50.759, 134.528, 176.914, 17.007, 171.802]

SOLUTION: 86.782

PROBLEM: [-47.309, -46.076, 191.14, -6.032, 4.858]

SOLUTION: 19.316

PROBLEM: [247.226, -80.192, -32.113, 26.5, 247.758, 214.918, 54.096]

SOLUTION:
96.885