um... not quite.

If you have a pocket pair (which is 17:1 odds)
you can determine the chances of one of your cards coming by multiplying the chances of it not coming,
So 2 cards will make your set, 48 won't
48/50 x 47/49 x 46/48 = 0.8824
we then subract this from 1 and get 0.1176
so the odds are 0.8824:0.1176
divide both sides by 0.1176 and we get
7.5:1