Hi

Yes, you can get admission in Bcom hobs in JMI even if you don't have maths in 10+2

This is because,

For bcom hons in JMI , maths in 10+2 is not mandatory.

As per JMI eligibility criteria,

To be eligible for Bcom hons, all you need is to havd at least 50 % marks in 12th board examination in the aggregate of your best 5 subjects.

You can check the same at:-
https://www.careers360.com/university/jamia-millia-islamia-new-delhi/bcom-hons-course

Your admission is on the basis of entrance examination conducted by JMI

Thank you