Basically to get admission in top IIM'S you will have to get at last 99 percentile or above, still there is no guarantee that you will achieve it.

Yop IIM's follows two different set of rules. One for Initial calling and otehr for Final Selection. For Initial calling they give 35%-40% weightage to your previous credentials and 60 to 65 to CAT score.

For Final calling they give 10% -20% only and remaining is given to GD, PI and CAT score.

For XLRI you will have to XAT. For SP Jain you need 90-92.

All the best!!