Hi,

Yes ,a 12th repeater can become IAS or pilot if he fullfill the eligibility criteria.

The eligibility to become an IAS is you should have passed graduation from any stream.

To do a course to get pilot license after 12th the eligibility is 10+2passed from a recognized board with minimum 50% of marks and a minimum age of 17 years.

So a 12th repeater can apply to pilot course. And to a IAS course also but to apply for IAS he has to complete graduation.