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: [-7.775, 55.997, 216.046]

SOLUTION: 88.089

PROBLEM: [181.256, -78.191, 162.427, -90.527, 123.709, 248.073]

SOLUTION: 91.124

PROBLEM: [167.582, 89.691, -67.166, 95.805, 229.748, 160.965]

SOLUTION:
112.771