<p>like amarkov said, its handled differently by each school. Some schools accept zero AP credits (ie. cal tech) while others only accept credits for certain exams. Other school will give you prorated credit based on the score you got. For example, a 3 will get you only credit while a 5 will give you 3 credits and remove that class requirement. It depends on the school.</p>
<p>The general rule is that a 3 will you credit for the course.</p>