Quick Interview Question; Have to leave for Interview in 45min, so please help!

<p>I have to leave for my Brown alumni interview in about 45 minutes (I know, I should have posted this earlier), and I just looked back at the email and am confused about one line: "These interviews are informal, and will last approximately 20 minutes." I get the 20 minutes part, but does "informal" refer to clothing or to the questioning, etc.? I assume since it's an alumni interview, it doesn't have to be as formal as a regular one, so it isn't vitally important that I know before I go, but my two options are either a long, patterned skirt and a sweater (what I wore to my first two; they were both rather informal, and my interviewers were both current grad students), or a pair of black dress pants and a sweater or button down top. Thanks!</p>

<p>Either would be fine, I'm sure.</p>

<p>Thank you so much!</p>