HI,

The eligibility for CAT  Bachelor's degree with minimum 50% or equivalent CGPA,and 45 Percent (for SC, ST and PWD category) 

so you need to have good percentage in degree too ,to get admission in good IIMS AND B SCHOOL

but some BSCHOOL have there own certeria who dont consider degree marks that much but give admission based on entrance score

GOOD LUCK

hey david!!

Candidates belonging to the general category must score at least 50 per cent marks or equivalent CGPA. They must have completed their graduation by an Act of the Parliament or State legislature in India or declared to be deemed as a University under Section 3 of the UGC Act, 1956.Candidates who belong to Scheduled Tribe (ST),  Schedule Caste and persons with disability must score at least 45 % marks in their graduation to be eligible to appear in CAT 2019.

so if you get less than 45% in degree you are not eligible to write cat exam.

thank you