I am confused on the average ATAR, can someone explain?

[Stormbreaker-X]

So my teacher told me today that the average ATAR is 50. Isn't it in the 60's? He said that the average study score is 25. I am so confused now, so what is average and what is not?

[Joseph41]

The average raw study score for every VCE subject is 30 (see page 4 here). I believe the average ATAR in Victoria in 2020 was around 68.

EDIT: The average ATAR isn't 50 because in essence you're competing against all potential ATAR-achievers in that year, including those who don't ultimately achieve an ATAR (due to leaving school, for instance) - so the average ATAR is higher.