SOLUTION: An office building has 7 doors. Four doors are only entrances to the building and two doors are only exits from the building. In how many different ways can someone enter and exit
Algebra ->
Permutations
-> SOLUTION: An office building has 7 doors. Four doors are only entrances to the building and two doors are only exits from the building. In how many different ways can someone enter and exit
Log On
Question 962523: An office building has 7 doors. Four doors are only entrances to the building and two doors are only exits from the building. In how many different ways can someone enter and exit the building? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! An office building has 7 doors. Four doors are only entrances to the building and two doors are only exits from the building. In how many different ways can someone enter and exit the building?
----------------
Entries: 4 doors
Exits::: 2 doors
variable: 1 door
-----------------------
Entry ways:: 5 ways
Exit ways::: 3 ways
---------------
Total different ways to enter and leave:: 5*3 = 15 ways
=============
Cheers,
Stan H.
-----------
(