True, however that subject they're good at may only make up 2 of their total 10 units counted, and they maybe not so 'Pro' at their other subjects.
And btw you picked out high scaling subjects for the 'remaining subjects', most people in the HSC don't do such high scaling subjects, so just...
Because on the Jackson 5 skit thread i posted "It was bad taste imo" and in the "Whether thread" i posted "whether what?", and got neg repped by two guys with full bar lol.
Yeah you'll be alright OP, as Aquawhite said, aslong as you use your remaining time wisely you'll be fine.
And my one of my teacher you need a good balance, you cant be studying all the time you need to have extra curricular activities in your HSC year aswell to maintain a healthy balance.