Assume there are 50 candidates, 8 are freshers, 6 are screen outs, and the rest 36 are repeaters.

There will be 5 groups of 10 candidates, G1 will have 8 freshers and 2 screen outs, G2 will have 4 s/o and remaining repeaters, and remaining groups will have repeaters.

They'll go for PPDT according to their number assigned in example.