Hello,
You cannot join Merchant Navy if you haven't studied Mathematics in 10+2 level. There is no provision to join Merchant Navy with Biology, Physics and Chemistry in 10+2 level. The Education qualification requirement is that you must have passed 10+2 with Mathematics, Physics and Chemistry with minimum 50% marks from a recognized board. As you haven't studied Mathematics in 10+2 level you are not eligible to join Merchant Navy however, you can given Mathematics exam through NIOS. After obtaining the required qualification you need to apply for the entrance examination for admission in to any of the Maritime Institute. To get the list of Entrance examination, institutes, courses and requisite information click on the link below
https://www.careers360.com/careers/merchant-navy
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