How are you going to interview 30 people, make proper assessments and offer jobs, all on the same day.
Are these candidates pre-qualified, or are you just going to interview any Kumar, Raj, or Sandeep that walks in off the street?
Do you have a proper Job Description and Person Specification for each of the 10 positions.
Do you have a standardised interview question sheet so that candidates for like jobs are asked the same questions so you can compare apples with apples?
Have all your interviewers been trained in correct interview techniques?
Have you got a standardised and robust reference checking process in place?
As I write this, it is now almost 11am on Saturday in Tiruppur. Hope it is going ok for you.
Let us know what happened.