CBSE 10th

It is based on the university you want to study in. If you want to go to IIMs then at least 99 percentile. Other than that, there are some good universities which you can choose like Symbiosis for which you need to appear SNAP and Narsee Monjee for which the exam is NMAT or you can appear for CMAT/MAT, they too are nationally accepted so you can get admission based on that.

For doing MBA / PGDM, first you need to crack management exams like CAT /CMAT/ MAT/ XAT/ SNAP. Have a good percentile, because for getting into any management institute score cards of any such exam is required. Then only you will be eligible for Amity University, you might have other options too to look for like colleges of Symbiosis, NMIMS, NIBM, NIA, MICA, IMT, IMI, MDI, IITs, IIMS and several such colleges.

If you have completed your class 10th, then there is no need to have admit card. You will not require it anywhere else. Hope your query is resolved. Best of luck.

Yes, you can apply easily, but you need to clear CAT exam.

Hi,
Yes, you will get admission in IIM-Ahmedabad.

Yes, you can get admission in IIM-B.

Unfortunately, the minimum eligibility for the certificate programme is 10+2. You may check the details in the link below
https://www.nift.ac.in/sites/default/files/2018-01/CEP 2018-19.pdf

What about CAT score? If the score is above 90, then there would be high chances and this would be for the interview call not the final selection.

If you want to complete your 10th, then just visit your school and ask them for admission. If you want to do it in another school, take the leaving certificate from previous school and apply for the new school.

You cannot join merchant navy directly after 10th. You have to complete your 12th with sufficient marks also appear for the entrance exams conducted by various institute. You have to take Science side in 12th in which maths is compulsory.