Is there admission depends on CET as entrance exam if yes then how much marks I needs to score

No, the admission to PGP program of IIM Shillong takes into consideration only CAT entrance exam. As for the minimum score required, there is no specific cut-off as such. There is weight-age given to you 10th std., 12th std and graduation marks as well, along with your CAT score. IIM Shillong also e

In IIM's the admission depends upon CAT exam percentile score and not the CET score. Through MH-CET you can apply to colleges such as Jamnalal Bajaj, Welingkar Institute, etc. The cut-off for Jamnalal Bajaj was around 160 marks.

Admission to IIMs is based on CAT Score. There is one Maharashtra CET I know which is there for admissions to state MBA programs. But if you are looking for PGDM from any of the IIMs, CAT is the only way.