The 20:5 rule is related to railway operations in India. This rule specifies that in a railway coach, 20 seats are reserved for passengers with confirmed tickets and 5 seats are kept for passengers on the waiting list (RAC - Reservation Against Cancellation). This helps manage overbooking and cancellations efficiently.

Related Topics

The 20:5 rule falls under Indian railway reservation policies. Related areas include ticketing systems, passenger amenities, and railway administration rules that ensure smooth travel and fair allocation of seats.

Key Formulae

While the 20:5 rule itself is a fixed policy ratio and not a mathematical formula, it can be expressed as:

$\frac{\mathrm{Confirmed\; Seats}}{\mathrm{RAC\; Seats}}=\frac{20}{5}=4$

This means for every 4 confirmed seats, 1 seat is allocated to the RAC category.