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: [146.748, -23.736, 49.614]

SOLUTION: 57.542

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

SOLUTION: 16.779

PROBLEM: [143.804, 211.397, -82.133, -85.488, 246.214, 158.184]

SOLUTION:
98.663