Hello dear student,
usually the marks that you obtain in your class 10th and 12th and also in your graduation will not affect your admission in any college through cat. you should mainly focus on the percentile that you will be obtaining in CAT because that will decide in which college you will get admission.
But there are colleges like IIM etc where during shortlisting other than CAT score these marks also taken into consideration.
I hope this was helpful
Thank you
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