JJ Smooth

Hi all. I'm an econ and math double major, and I plan to apply to econ PhD programs next school year. Next semester I have the option of taking either Probability or Set Theory. Set theory is with a super professor who I may end up asking for a recommendation. Also, I'm really interested in Set Theory and that's not the case with Probability. Set Theory is only being offered at my school in the fall, whereas I could take Probability in the spring, but I've heard Probability is an important class for graduate school, and if I take it next semester it will show on my transcript when I send out my applications. Any suggestions would be a huge assist. Thanks so much!