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#1 2009-03-26 12:43:14

simron
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Counting Problems

1. Say the license plates in Mathopolis consist of 2 letters followed by 3 digits. Assuming that none of the digits or letters can be the same, how many possible license plates are there?

Last edited by simron (2009-04-06 01:35:34)


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#2 2009-03-26 12:51:05

simron
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Re: Counting Problems

(Note that because I am turning these into Mathopolis questions, I will be posting these one by one.)


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#3 2009-03-27 21:36:55

smiyc86
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Re: Counting Problems

26c2 * 10c3 * 5!


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#4 2009-03-28 10:07:15

John E. Franklin
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Re: Counting Problems

or maybe 26 x 25 x 10 x 9 x 8 for license plate #1 problem.


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#5 2009-03-30 16:20:33

smiyc86
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Re: Counting Problems

well i think franklin is correct ... i didn't notice the "followed by" constraint ...


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#6 2009-04-06 02:05:32

simron
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Re: Counting Problems

I got


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#7 2009-04-06 02:16:37

mathsyperson
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Re: Counting Problems

I get John's answer too. There are 10 digits to choose from. wink


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