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#1 2009-03-25 13:43:14
- simron
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- Registered: 2006-10-07
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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 (2009-04-05 03:35:34)
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#2 2009-03-25 13:51:05
- 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 2009-03-26 22:36:55
- smiyc86
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Re: Counting Problems
26c2 * 10c3 * 5!
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#4 2009-03-27 11:07:15
- 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 2009-03-29 17:20:33
- smiyc86
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Re: Counting Problems
well i think franklin is correct ... i didn't notice the "followed by" constraint ...
I love Maths and Music ... dunno which more
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#6 2009-04-05 04:05:32
- simron
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Re: Counting Problems
I got
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#7 2009-04-05 04:16:37
- mathsyperson
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Re: Counting Problems
I get John's answer too. There are 10 digits to choose from.
Why did the vector cross the road?
It wanted to be normal.
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