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: [125.987, 140.164, 103.07, -78.923, -92.734, -96.888]

SOLUTION: 16.779

PROBLEM: [113.021, 101.946, -14.79, -8.555, -59.095, -74.169, 80.193, 157.87, 26.321, -19.87]

SOLUTION: 30.287

PROBLEM: [-47.011, 188.981, 162.934, 78.594, 20.617, 176.363, 118.07, -50.264, 202.433, 249.137]

SOLUTION:
109.985