When Sailing three flags displayed in a given order to create a signal to other ships. How many different signals can be made using 3 flags if there

When Sailing three flags displayed in a given order to create a signal to other ships. How many different signals can be made using 3 flags if there are 5 flags from which to select? Now, pretend you don't know what the 3-flag signal for "stop", but another ship is bearing down on your vessel. What is the probability that if you select three flags from the group of 5, you will select the signal for "stop"?