Amazing that 3 of the 4 remaining have only been coaching their teams for this year and two are rookies. When is the last time a brand new coach won it all? Ricky Stuart was it?
In fact new coaches seem to rarely even feature in GFs, but it's a guarantee this year
whilst your assumption is numerically valid, statistically it is incorrect..
the dogs vs souffs game gives a 100% chance of a new coach making it to the grand final, the true percentage will actually be determined on friday night if the storm win (cause if the sea eagles win, it's a 100% chance that the winner will be a new coach).
if it's a storm vs dogs grand final, then the dogs will be favourites (estimating $1.65) which would mean that the odds of them winning would be 71%.
if it's a storm vs souffs game, then based on what we saw in week 1 of the finals, there is a 0% chance of a new coach winning the title.
based on the above three scenarios (storm not winning, storm playing bulldogs, storm playing souffs) when these results are balanced out (100% + 71% + 0%)
the true percentage chance of a new coach winning is 57%.
that is all.