Grand Ecole Polytechnique: Bachelor in Math and Econ suitable for mathematical finance at grad level?

Hey there!

So I'm planning to make my bachelor on a french grand ecole. Is a mathematical economics degree suitable for graduate studies in Mathematical finance like the program from Oxford? I really can't afford something like Oxford, UC Berkeley, UCL at Undergraduate Level, which is why I came up with the idea to study in France (since it's cheaper, since France is in the EU).

Can anyone help me?
It is all up to the math contained in your degree. For example, courses in Differential Equations, Multivariable Calculus, Linear Algebra, some data structures/algorithm course, and maybe even some exposure to Stochastic Calculus. These are the main math courses I see on program websites as prerequisites in an undergraduate degree.