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: [94.329, 154.819, 83.732, 213.846, 14.951, -10.405, 159.846, 125.164, 75.84, 121.074]

103.32