Adding or removing images is disabled during broadcasting. You'll be able to update images again once the broadcast session is over.

Images listed here are available to use in your code in this trinket. Click the Image Library button to include more or upload new images.

When the problem asks you How many possible ways can you arrange 10 books on a shelf (10P10) ...or can you pick from a group of 10 to be in a committe of 3 (10C3)...use this program.
n (total possible to choose from):