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: [138.602, 158.458, 241.327, 194.509, 169.45, -56.151]

SOLUTION: 141.032

PROBLEM: [100.422, 199.731, 138.971, 95.515, 9.517]

SOLUTION: 108.831

PROBLEM: [126.136, -23.429, -25.125, -32.203, 36.405, 44.406, 147.828, -97.708, -69.793, 235.046]

SOLUTION:
34.156