Hey there
70 marks is a low score in KEAM many students will be scoring more than 150 and thus you need to have good 12th percentage to have good rank in KEAM.
check the link for previous year cutoff
https://engineering.careers360.com/articles/keam-cutoff
check the link for college predictor
KEAM College Predictor 2019 - Know your college admission chances base ...
good luck
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