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: [15.748, -13.369, -79.943, -2.78, 169.174, 101.44, -84.923, 189.589, 83.541, -37.629]

SOLUTION: 34.085

PROBLEM: [-51.603, 117.351, -67.451, 218.664, 68.981, 167.005, -53.851, 104.996]

SOLUTION: 63.012

PROBLEM: [-13.371, 112.6, 240.359, 165.509, -33.503, 118.087, 172.774, -1.423, 20.807]

SOLUTION:
86.871