the numbers from the ADEA book.
In state
44 interviewed, # accepted NR, Number attending 15
Out of State
322 interviewed, # accepted NR, Number attending 102
if this year isn't different than last year, then you have a pretty good shot of getting an acceptance if you get in. I'd imagine a good portion of people getting accepted to Penn would accept it. But then again, people typically apply to 5+ schools, and if you're getting into Penn, then you might also be getting into other Ivies or your state school. My guess is they accept the majority of people they interview, so good luck if you got an interview.