Hi there! Long time lurker of this thread and I also got into Munk's MPP program the same time you did! I had the opportunity to talk to a few current MPP students with the same concern as you and 3/4 of them had no prior quantitative classes taken throughout their undergrad and found through tutorials/help centres at Munk they were able to pass the first year courses just fine! The current students also told me the community is really close and a lot of students set up informal peer tutoring sessions throughout the year Hope this helps!