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.
Input: [141.861, -8.905, -20.756, -36.74, 151.889, 69.077, 159.175, -34.54, 155.465, -85.237]

49.129