I'm in the math Higher level course in the International Baccalaureate programme, and it offers a choice of one from four topics during the final year to study in depht. Now i have a hard time chosing one, so I would appreciate if someone could gimme some tips The subjects are: Statistics and probability, Sets groups and relations, Series and differential equations and discrete mathematics. Now my interests are in the field of physics and engineering, which leaves me with the choice of the later three. However i cant make a sound judgement since i have no idea what sets groups and relations are all about. Can someone gimme a brief of their respective applications/usefulness in university studies? Thanks.