What are my chances of getting off the waitlist?

<p>I want to take the General Nutrition class at Cal. The class still has 30+ spaces in the class but all the discussion sections are full. I put myself on the waitlist and signed up for another class to cover myself. I am in position 15 for the waitlist and the selection is manual for coming off the waitlist. There are 700 some odd seats in the class. What are my chances of coming off the waitlist???</p>