How does ARAM random pick work?

Curious if ARAM random pick is based off your owned champions or all 100+ champions. Have only gotten a chance to play 1 game and it seemed like it was based off my own champions but half my team said they were playing champs for the first time.


Solution 1:

ARAM champion selection is based only off of champions currently available to you. This includes all champions you own, plus all the ones that are available free at the time.