At the space museum a movie starts every 15 min There are 5

At the space museum, a movie starts every 15 min. There are 5 min between shows. If you enter the theater at a random time, what is the probability that you will have to wait more than 2 min. for the next movie to start?

Solution

Movie starts in 15 mins

Interval between two shows =5mins

Total time between two shows= 20 mins

If a person have to wait for more than 2mins, the probability=18/20

=9/10

=0.9