Is ARAM Champion Select Truly Random?

Question

I get the feeling that ARAM isn't truly random. For one, it seems that free champs are present in games more often than others, and pretty often I go through streaks of rolling the same champion. Now I suppose, these could be statistical anomalies and the free champs probably have high likelihood due to being available to all, but I'm curious if Riot has said anything about this.

To provide some quasi-data, I've played about 500 ARAMs and I own about 25 champions and there are two or three that only rarely get rolled. Now this is probably a biased recounting, but I can't help but wonder.

Invader Skoodge · Accepted Answer

Yes, it is really random. You will see free champions more often because they're the only champions that everyone owns.

Random is just that: random. Humans attempt to find patterns where there are none, and wind up perceiving that maybe the randomness isn't really random. They're wrong.

tamsai · Answer

I dont think so i got all champions, i play only in aram  with friend, and we establish  there is a pool of 20 champs that came often (may 2 of my mates got them all  too, and  2 last  all most) and this pool  stay  the same approximatly 3 or 4 day the same and change a little.
Even if there is no "true" random 1/6 of all champions came about 60% of the time ... (60% because 2 got some champions who  were not in the actual pool)

Serverfrog · Answer

True Random? No.
Pseudo Random? Yes

It will be so random a Computer could do without other Tools. So the Core Answer: Yes the Hero Selection is Random and no Pre-Defined Set Of Heros or Algorithms which choose them for you.
But i don't think it will be True Random.

Some Links for the meaning of True Random.

https://boallen.com/random-numbers.html
Wikipedia

Is ARAM Champion Select Truly Random?

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