Do visit this link to get answers of all your queries:

https://goo.gl/tuaUfD

Hi Farhan,

CAT cutoff is the minimum marks or percentile a test taker must obtain in order to qualify for the next round of selection process at 20 IIMs. Many IIMs have already released their official CAT 2017 cutoff for the admission process 2018-20. Check the following link for more details related to CAT cutoff - 

https://bschool.careers360.com/articles/cat-cutoff

As far as the average package is concerned, it varies from IIM to IIM. To get more details about placement insights, please visit the link given below:

https://bschool.careers360.com/download/ebooks/b-school-placement-insights-2017

You can check the details of all IIMs here -

https://bschool.careers360.com/tags/list-of-iim-in-india

All the best.