CBSE 12th

It's average score. Since ICSE paper setting and correction are very liberal, 82% is just an average score. When my daughter completed class 10th in 2014, around 70% of students scored above 80% in her school.
Any way you can always work hard and do much better in your future exams.

The minimum eligible criteria to pursue this course is 45%, since you have met the above mentioned criteria, you are eligible for this course.

In India, every one can get B.Tech. If Not from government College then Private universities are always available. So, with this much you can get B.Tech. But, you should consider your Marks before going to engineering. It will be water off energy and time doing Engineering. I think you should go for other Undergraduate Courses like B.Sc, BCom, or B.A. Otherwise, it's your choice.

Hi,
You can get to college and courses in Kolkata BBA through the website link mentioned here- https://www.shiksha.com/bba/course/bachelor-of-business-administration-university-of-engineering-and-management-kolkata-rajarhat-236632.

Please visit this link. This is college predictor and hope this will help you: https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

The exam will be conducted from 21 May '19 -13 Jul '19. For further details refer the link: https://www.shiksha.com/university/jamia-millia-islamia-jmi/jamia-millia-islamia-entrance-exam?course=1159.

She can sit in JoSAA counselling but there is no chance of getting any NIT or IIIT college. She may try for GFTIs colleges or private colleges with this rank in JoSAA or CSAB counselling.

You may get. Chances are there.

I hope this will work.
Eligibility Criteria for B.Com
B.Com:
For admissions into any of the B.Com programs, the candidates should have passed in Higher Secondary School Examination with Maths and English as core subjects.
B.Com in Banking & Insurance:
A candidate for being eligible for admission to the Bachelor of Commerce (Banking & Insurance)Degree Course shall have passed XII Std. Examination of the Maharashtra State Board of Secondary & Higher Secondary Education or its equivalent and secured not less than 45% marks in aggregate at (40% in case of reserved category) one & the same sitting.