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]: [109.74, 169.0, 195.864, -1.043, 51.968, -56.564, 214.711, -78.61, 212.459, 228.74]
[EX A]: 104.626

[EX Q]: [-19.756, 27.825, 23.624, 238.804, 122.208, 159.567, 197.245, 12.389, 24.138, 48.017]
[EX A]:
83.406