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: [234.272, 196.413, -92.425]

SOLUTION: 112.753

PROBLEM: [-21.77, 172.703, -31.807, 129.587, 84.624, 14.279]

SOLUTION: 57.936

PROBLEM: [156.098, 201.827, 69.599, -98.683]

SOLUTION:
82.21