What admission?
You need A levels ,or if your parents have money - they can enrol
you in those 1 year pre-uni courses in selected universities like
Melbourne University and Sydney University . That also means more
money .
Oh ya , to get into med - you need to get all 85 and above for
Trinity College pre uni course in University of Melbourne to get a
very good chance into med school. If I remembered right , one guy
got 85 in physics, chem, bio but 70+ in english and maths for
trinity - he could not go into Med School. The only 2 in his class
who got into Med School scored 90%+ in all subjects.