Question about PSATs?

I'm a Sopre and I just got my PSAT results...I hadn't studied for them at all or anything...I got a 1750...Could someone tell if me if this is a decent score? Taking into consideration I'm only a Sopre and didn't prepare. Meaning I will do much better on the real SATs. Is 1750 good for someone under those cirstances? Also, does anyone know the average SAT score for college-bound Juniors?