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: [123.511, 37.811, 249.595, -25.324]

SOLUTION: 96.398

PROBLEM: [54.715, 180.963, 239.308, 175.084, 147.044, 136.262, 184.009]

SOLUTION: 159.626

PROBLEM: [165.647, 110.893, -83.152, -56.699, 19.53, 48.825, -64.043, 199.192, 249.46, 244.789]

SOLUTION:
83.444