hi athul,

Keam score and board marks are taken in 50:50 ratio to calculate the Aggregate marks in keam

Our keam score which is generally out of 960 is standardized and made out of 300

Similarly our board marks (whether state board or cbse or isc) is standardized based on the overall performance of the students appearing for the exam (also out of 300)

Our total score out of 600 is used in determining our rank

Hope this helps you.

best of luck.