Question: how much are paris rer tickets?
Answer: Single-trip "T+" Métro and RER tickets are interchangeable within the city of Paris (more specifically, in zones 1 and 2 of the Métro/RER network). You can buy individual tickets for €1,90 or carnets of 10 tickets for €16,90 from vending machines in Métro and RER stations, using coins or a credit card.