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: [-72.554, 9.809, 27.09, 190.698]

SOLUTION: 38.761

PROBLEM: [124.333, 5.477, -53.787, 226.538, -40.577, -43.102, 214.118, 125.785, 151.837]

SOLUTION: 78.958

PROBLEM: [36.34, -16.727, 140.541, 127.454, -94.11, -74.52, 96.179, -9.121, -65.54]

SOLUTION:
15.611