Commerce

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You cannot decide to get into college of your choice in Mcom in Delhi University. Admission is based on 2 criteria:
Direct Admission - Here, you will get admission based on your percentage in graduation. For Dse, Srcc it goes up to 95 + for general category, for example.
Indirect Admission - Universit

You can check colleges offering hotel management course and apply for them. Some colleges offering the same are IHM Pusa, IHM Delhi, IHM Mumbai.

According to me B.Com in English medium is more versatile and can get you a job easily you can do Masters too easily. As you have completed your 12th from gujrati medium it will be a little difficult for you to adjust to English medium but it will be worth your efforts.

Yes, you can do it. But before that check eligibility criteria where you apply because like dse, JNU has the eligibility criteria for Maths. But other institutions don't have it.

It's totally entrance based exam. You should check their official website for it and cut off too.

The first semester fees for the 3 year bcom programme is INR 5350.

There are several colleges in India's that provides you Diploma in banking and financial course
Birla Institute of Management Technology Greater Noida. UNIPUNE - Savitribai Phule Pune University (SPPU) Ganeshkhind, Pune. Great Lakes Institute of Management, Gurgaon
University of Madras - Institute of

B.Sc. Economics is best option where you can do much better as B.A. You'll learn practical problems more than theory with Maths. But B.A. Economics with Maths stats and eco best combo for B.A. Also much better but package are different. Research both and find your area of interest where you want to