Theoretical scenerio
Situation 1: Kid A is first in mx1 in yr 12 and scores 70/84 on all his internal exams. In the externals he scores 70/84 (highest in his year) and recives HSC mark (aligned and the that bullshit) of Y.
Situation 2: Kid A (same kid, same school) in 5th on mx1 in yr 12...