60-something. It would make sense if it was exactly 50, but for whatever reason it isn't.
The reason why the median is usually in the low to mid 60's is becuase the state cohort used also includes those that dropped out after year 10. Somehow, their ENTERs are predicted such that they correspond to what they might have gotten if they stayed all the way through to year 12. Hence, if these people are included, then the median ENTER will be 50 or thereabouts.
As for my school, our year was the equal best performing year in my time at the school with another year level, with 8 people getting over 90 (well one guy got 89.95 haha), 4 of which got over 95 out of a class of 100 or so students. The median study score is almost always around the 28 mark, and the unis of choice are RMIT or VU, and their respective TAFEs.