How to get images from an array visible

I have a public array full of Images from the inspector. A method runs which for 6 iterations, should generate a random number which links to an index in the array and makes that image visible.

When i run the program however, nothing actually happens. Can anyone identify the issue?

This is my code:

 public class CoinDecider : MonoBehaviour {
     public Image[] Images; //array of images, assigned through inspector
 
     public void Start()
     {
         //for 6 iterations, a random number between 1 and 16 is generated
         //that number is assigned to the index of one of the images
         //said image becomes visible
         for (int i = 0; i < 6; i++) 
         {
             int number = Random.Range(1, 16);
             var selected = Images[number];
             selected.enabled = true;
         }
     }
 }