Currently I am studying a double major in Math and Physics, hopefully leading towards experimental physics, however come next semester I will have to pick my math "specialisations" from two of applied math (mostly chaos and optimisation etc.), pure math(mostly abstract algebra and analysis) and statistics/probability (not entirely sure what it would entail). After having spoken to the professors at my school I wasn't really able to find a clear cut answer (some said pure math was vital, while others supported stats, but everyone agreed applied math was extremely important because we have had to cut down on math classes in physics because of the rules of the university). From this I decided that it was probably important to know all 3 before I go much further so I would probably have to pick two to learn from professors and one to learn by myself. I was leading towards getting the credit of stats as I thought it would look better on my resume if I left physics, but I would very much like to know what others further down the line have done/experienced.