There's a different major at brown as well it's called Business, Organizations, and Entrepreneurship.
Basically it works in 2 different ways with regards to your question. At a lot of universities, you will apply directly to your major. The term generally used for this is "direct admit". However, at some schools, you are not allowed to apply to your major until you've been at the institution for 1-2 years. This means that you are not guaranteed a spot at the business school, and you might even be competing with transfer students for the slots. I believe this is the case at UC Berkeley. If that were to happen, you would probably be stuck doing economics.
I meannnnn you're going to be applying in the fall right? Have you run the NPC to see if they will be affordable? You should take on as little debt as possible for a social worker degree, they're not exactly rolling in cash.
You should probably just ask them, it's not like we magically know lol
Also, I think you're jumping the gun sending an application right now. IMO you should prepare it, and then send it after you complete 1 semester at your current institution so you have some grades.
"To be considered for admission as a transfer student, you should have completed a minimum of 24 semester college credits from a regionally accredited institution. Official transcripts must be sent directly from your college or university to Drexel. The transcript should include all courses in progress. You are required to submit transcripts from each college attended."
The thing that you have to remember is to not complain the whole time. You have to turn it around and look at it in a positive light, like why it made you stronger, or a better stronger, or what you learned from it.