One of my cousins is a part of the institute, and since he belongs from a non-maths background, he was able to elaborate on the situation. Here is what he had to say.
The journey can undeniably be difficult for non-Math students but it is not impossible. There are other students, alongside my cousin, who is in the same situation but are still managing to do good as other students with a Maths background. They are securing more than average in most quantitative subjects.
You will need to put in extra effort to do well in quantitative subjects. But you can as well as any student from a Math background if you are willing to work hard.
Thus, it depends upon how you choose to prepare and strategize.