How many nursing schools should I apply to, to make sure that I get in?

I heard these programs are really hard to get into. I currently have a 3.0. By May 2010, I will be done with all my prereq courses and I will have my AS in pre-nursing. I also already have my CNA and CPR certifications. Aug 2010 will be my junior year so I really need to get into a program and start by Aug 2010.

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