Answer to Question #23072 in Statistics and Probability for gilbert ramos
suppose a room has two doors. In how many ways can one enter and leave the room?
There are 2 doors => there are 2 ways of entering the room (n1 = 2) There are 2 doors => there are 2 ways of leaving the room (n2 = 2) The total number can be find by multiplying: N = n1*n2 = 4. & Answer: in 4 ways.