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 Q]: [246.278, 103.84, 214.867, -73.466, 230.048, -72.322, 172.891, 212.306, -78.335, 122.406]
[EX A]: 107.851

[EX Q]: [-73.074, 87.743, 221.875, 126.604, 31.513, 196.863]
[EX A]: 98.587

[EX Q]: [-29.693, 218.483, 91.889, 219.68, 109.158, -68.877, 221.54, 245.156, -20.18, 80.054]
[EX A]:
106.721