hello, 

the KEAM's eligibility criteria is a bit crispy and i am sorry but you might face problems because of your marks as the criteria says

• Candidates must have passed Higher Secondary Examination, Kerala or equivalent examination with 50% marks in Mathematics separately and 50% marks in Mathematics, Physics and Chemistry put together are eligible for admission.

• Candidates applying for admission under Management Quota in Private Self Financing Engineering Colleges or Government Controlled Self Financing Engineering Colleges need 45% marks in Mathematics, Physics and Chemistry put together.

refer to 

https://engineering.careers360.com/articles/keam-eligibility-criteria