A shuttle bus for a festival stops at the parking lot every 18 minutes and stays at the lot for 2 minutes. If you go to the festival at a random time, what is the probability that the shuttle bus will be at the parking lot when you arrive?

Answer 1

let's assume it is noon and the bus has just arrived.
the bus will be there from 12:00 - 12:02
again from 12:20-12:22
again from 12:40 - 12:42
for a total of 6 minutes in 60 minutes.

prob(of stated event) = 6/60 = 1/10