How hard is it to declare a math or data science major at UCSD?

Colleges and Universities A-Z University of California - San Diego
1

I’m a freshman who recently got admitted into UCSD as a undeclared physical sciences major. Since most of the majors that I am interested in are capped, I would really like to know how hard is it to declare a math or data science major at UCSD? Is the competition for spots just moderate or is it super tough?

2

Math: https://www.math.ucsd.edu/~handbook/undergraduate/cappedstatus/

Data Science:
http://dsc.ucsd.edu/node/3

This information should help you determine.