Applying to Two Schools

Colleges and Universities A-Z Carnegie Mellon University
1

I applied to CMU RD, and I want to major in math. However, I’m also interested in studying cognitive science, which I indicated on my common app by saying my second major choice is psychology (cognitive science wasn’t an option). Now, when I looked at the application portal, I saw that it meant I technically applied to MCS and DC, as my first and second choice, respectively.
How likely is it that I would be accepted to DC instead of MCS? (1520 SAT: 740 R 780 M, 770 Math II, 570 Physics, 4.45 GPA)
If I was accepted to DC instead of MCS, would it be difficult to pursue an additional degree in math?

2

Not sure if “cognitive science” is the same as “neuroscience” but it seems to be a joint program between both your colleges of interest:

https://www.cmu.edu/neuro/major/index.html

Also, you should be able at least to minor in math from DC.