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: [201.917, 240.159, 36.615]

SOLUTION: 159.564

PROBLEM: [-2.772, 225.483, 211.749, 45.779, -82.623, 229.799, 107.783, 64.653]

SOLUTION: 99.981

PROBLEM: [123.821, -2.509, -90.635, -97.465, 5.793, 46.949, -96.586]

SOLUTION:
-15.805