Homework Help: math

Posted by Meghan on Friday, September 30, 2011 at 12:14am.

Suppose that the format for license plates in a certain state is two letters followed by four numbers.
How many different plates can be made if repetitions of numbers and letters are allowed except that no plate can have four zeros?

math - Reiny, Friday, September 30, 2011 at 12:23am
with no restriction at all : 26x26x10x10x10x10 = 6760000

but there are 26x26 plates that would end in 0000

so number of plates as required above = 6760000-676 = 6759324

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