There is no definite answer to this, as the score keeps on changing every year. But according to the MICA official website “there is no weightage accorded to performance in CAT, XAT, GMAT in computation of the composite score used for ranking. read more
The CAT cut-off used to be 90 percentile till 2009 but the new rules don't talk about any cut-off. You're just required to appear for CAT before MICAT. The MICAT cutoffs are never announced by MICA. read more