what should I study after 10th for become an airmen in IAF or a railway ticket collector or loco pilot?
To become a airmen in IAF requires 10+2 equivalent education qualification, only with 10th class you cannot apply to the airmen post you must do the class 12. The airmen is also equivalent to a army post So this requires a lot of medical qualification and also they requires physical value. The vacanies will be posted on IAF website or newspaper you need to checkup and apply for that.
To become railway ticket collector or loco pilot, both the vacancy posts will be recruited by Railway Recruitment Board. for this two post you can go with your 10th class certificate with minimum of 50%. the vacancy posts will be released by the RRB you need to check the website and apply to it.