If I take humanities with maths in 11 and 12, will that allow me to study commerce or economics after 12?

Yes, you are still able to pursue a degree in commerce or economics even if you took math in high school. Most universities allow students with a background in math to enroll in B.A. and B.Sc. programs in these fields. You need to have passed the 12th grade with at least 50 percent so that you can a

Yes Deepika, you can pursue commerce or economics if you have done your humanities with mathematics in your class 11th and 12th.