@guest: Re# 91771-0
RAC= Reservation Against Cancellation
Different trains have different no. of RAC seats depending on the class of travel - SL/3A/2A. 1A and CC do not have RAC.
it will be approx.8 per coach in SL (figures may change) In 2A/3A it is less.
If...
more... a passenger has RAC booking, he can travel in the train. The passenger will be sharing the Side Lower Berth with some other passenger.
Depending upon vacancy and sequence, RAC passengers are allotted berths during journey. it is also possible, that a passenger will have to travel in RAC witout getting full berth for the entire journey.