Please solve the programming task below using a self-contained code snippet in a markdown code block.

A sequence of numbers is called an arithmetic progression if the difference between any two consecutive elements is the same.
Given an array of numbers arr, return true if the array can be rearranged to form an arithmetic progression. Otherwise, return false.
 
Please complete the following python code precisely:
```python
class Solution:
    def canMakeArithmeticProgression(self, arr: List[int]) -> bool:
```