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: [-32.557, -70.922, 191.786, 244.222]

SOLUTION: 83.132

PROBLEM: [97.151, 211.662, 13.529, -83.075, 185.97, 7.1, 99.109, -81.725, 17.327]

SOLUTION:
51.894