SOLUTION: A building has a 5 entrance gates and 4 exit gates. In how many different ways can a person enter and then exit from the building?
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-> SOLUTION: A building has a 5 entrance gates and 4 exit gates. In how many different ways can a person enter and then exit from the building?
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Question 1017526: A building has a 5 entrance gates and 4 exit gates. In how many different ways can a person enter and then exit from the building? Answer by JulietG(1812) (Show Source):
You can put this solution on YOUR website! Enter A, exit a
Enter A, exit b
Enter A, exit c
Enter A, exit d
Enter B, exit a
etc
There are 4 possible exits for each entry. 5*4=20
