Answer Happy

It has been determined through studies that on Mondays at the
Sydney international airport, international passengers follow
this arrival protocol:
1. Firstly they are checked by an airport officer that
processes, in mean 6 passengers per hour. 1 in every 10
arrive with everything in perfect conditions, in which case
they are released for the final check. The rest proceeds to the 2nd
station.
2. The 2nd station verifies forms. 12 passengers per
hour can be processed. Of these, 1 in every 5 are released for
the final check and the rest proceeds to the 3rd station.
3. The third station then checks passports at a rate of 20
passengers per hour. All the passengers then proceed to the
final check.
4. The final check verifies all the paperwork again at a rate of
60 passengers per hour. Only 1 in every 100 has problems
and if this happens they must return to the 1st counter. The
rest are then released to take an Uber.
You are a Uber driver that arrives at the airport exit. What is
your mean waiting time until being called for a ride?