input: Write a python function to shuffle a list of numbers randomly.
  assert len(randomized_list([1, 2, 3, 4, 5])) == 5
  assert sorted(randomized_list([10, 20, 30, 40, 50])) == [10, 20, 30, 40, 50]
  assert set(randomized_list([100, 200, 300])) == {100, 200, 300}
output: import random
  
  def randomized_list(numbers):
      shuffled_numbers = numbers[:]
      random.shuffle(shuffled_numbers)
      return shuffled_numbers