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]: [146.815, 125.411, 84.472, -63.01, 79.256, -34.213, 248.004, -86.96, -39.397]
[EX A]: 51.153

[EX Q]: [246.744, 206.484, 194.841]
[EX A]: 216.023

[EX Q]: [230.4, 180.032, 189.98, 128.532, 62.211, 100.423, 15.212, 23.843, 89.555, 33.028]
[EX A]:
105.322