Hey can anyone suggest me whether the subjects I chose are of good combination?

I have a business background and I opted these optional subjects:
IR
History of Pak and India
BA
Journalism
International law

But really want to go for pure maths. I am good in maths as I had 70% marks in maths in olevels, 50% in Alevels and 70% in my BSC. Should I replace Int. Law with maths or not?