In term of your first question rohitpi, demand for actuaries is pretty strong, while admittedly there are not as many places avalible as say accounting, you have much less competition, really you should have no real problem getting a job if you have decent marks.
Acinod: I'm biased of course but I would advocate going for actuary. You seem
To have already convinced yourself out of med, and while admitedly the science scholars program does offer more options, it seems to waste two years before you can do anything specific that will get you one of the jobs you listed. In terms of your apprehensions regarding commerce subjects, both TT and I had never done commerce subjects in much depth at all and are Defs finding commerce interesting, so don't worry there. In terms of work to be an actuary, you really can quite easily find a job after your three year degree, extra qualification on top are just a bonus, admittedly, not the easiest tests and exams to pass, but hey, comparedto med or getting another professional degree you're way ahead, plus ur working and making money at the same time.
One more miscellaneous point, you mentioned commerce scholarships, as a Copland scholar at Melbourne, let men tell you Melbourne have awesome awesome scholarships, as an example, in the next 5 years Melbourne plan to raise 5million dollars JUST for commerce scholarship, but it's more than the mere money and mote about the opportunities and contacts that are useful