Each signal that a certain ship can make is comprised of 3 different flags hanging vertically in a particular order. How many unique signals can be made by using 4 different flags?
Each signal that a certain ship can make is comprised of 3 different flags hanging vertically in a perticular order.How many unique signals can be made by using 4 different flags?
A 10
B12
c 20
D 24
E 36