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: [153.482, 150.917]

SOLUTION: 152.2

PROBLEM: [37.853, 78.283, 143.128, 82.561, 181.661, -89.154, 50.037]

SOLUTION: 69.196

PROBLEM: [77.848, -4.699, -16.474, -58.741, -55.387, 50.842, -98.719, 117.979, -25.477, -43.193]

SOLUTION:
-5.602