The average pre-dent applys to 9-10 schools.
My stats are 3.3 overall, 3.6 science, and 3.88 BCP, and I applied to 18 schools
There is no correct/wrong answer as to how many schools you SHOULD apply to, you go with schools that you see ur self attending and most importantly, paying attention to whether they accept out-of-state students or not.