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.

Ex Input:
[15.491, 60.283, 240.958, 155.995, 35.585, -55.875, 82.379, 142.503, 95.176, 85.281]

Ex Output:
85.778


Ex Input:
[160.713, 125.985, 186.982, -94.178, 183.77]

Ex Output:
112.654


Ex Input:
[71.235, 31.881, 169.818, 74.038]

Ex Output:

86.743