Question

A particular flight from city a to city b is on time 91% of the time. if 60 of these flights are made in a month, what is the probability that all of them are on time?

Answer 1

The events are independent (and less importantly mutually exclusive).
This means that the probability that they are all on time is simply:
(0.91)⁶⁰ = 0.00348725.....
= 0.00349 (or 0.349 %)