I think if that degree type is interesting, there will be easier gets than CMU and Ga Tech - awesome if you can get in, but a big if of course.
Babson has a concentration in Computational and Mathematical Finance and is a target.
An easier admit would be Stevens Tech.
I’m sure there are more - if you look at curriculums and find out this is more in your interest than engineering.
Computational & Mathematical Finance | Bachelor Degree & Courses | Babson College
Bachelor’s in Quantitative Finance | Stevens Institute of Technology