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: [21.723, 130.05, 75.095]

SOLUTION: 75.623

PROBLEM: [-75.664, 192.225, 2.107, -86.22, -51.11]

SOLUTION: -3.732

PROBLEM: [20.3, 232.812, -49.748, 205.222, 110.007, 21.877, 183.686, 191.009]

SOLUTION:
114.396