Hello Anand.
These are the eligibilities.

For HSC/ Class XII/Equivalent/Diploma Score The percentage of marks obtained in HSC/Class XII/Equivalent/Diploma score would be the aggregate marks of all subjects that appear in the marks sheet or grade sheet irrespective of the boards regulation. Any candidate with a score of 60% or below gets zero weightage. Any candidate with a score 81% or above gets a maximum of 7.5%. The weightage of 7.5% is proportionately allotted for any candidate with a score between 60% and 81%.

For graduation,

Any candidate with graduation score of 60% or below gets zero weightage. Any candidate with a score 81% or above gets a maximum of 7.5%. The weightage of 7.5% is proportionately allotted for any candidate with a score between 60% and 81%.

Above are the valid points only for 12 th. Standard and graduation marks consideration .

Thank you

Hey,
As your ssc level percentage is low so it may be difficult for you to get into iim Kozhikode as there is no marks for shortlisting below 60%.
For more references gp through the article-
iim Kozhikode criteria of admission
If this information was not helpful please let me lnow by commenting below.
All the best!!

Respected Sir,
For admission into IIM's,
You need to have about 90 marks in you CAT. That's the first and main basic requirement as CAT constitute for 60% of the marks. 10% for both your tenth and twelveth mark and 10% is based on your Personal Interview. To know more,kindly visit.
https://bschool.careers360.com/articles/iim-kozhikode-cutoff
Hope I was able to help you .