SOLUTION: The access code for a cars security system consists of four digits. The first digit cannot be zero and the last digit must be odd. How many different codes are available? Thanks

Algebra ->  Permutations -> SOLUTION: The access code for a cars security system consists of four digits. The first digit cannot be zero and the last digit must be odd. How many different codes are available? Thanks      Log On


   

Question 1027697: The access code for a cars security system consists of four digits. The first digit cannot be zero and the last digit must be odd. How many different codes are available?
Thanks much.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
There are 10 digits to choose from.
First block only 9 since zero is disallowed.
Last block only 5 since it's odd (1,3,5,7,9)
N=9%2A10%2A10%2A5=4500