SOLUTION: How many five-digit zip codes contain exactly one zero?
Algebra.Com
Question 356906: How many five-digit zip codes contain exactly one zero?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
0XXXX
X0XXX
XX0XX
XXX0X
XXXX0
If you allow X to vary from 1 to 9, then for each row you have choices.
Since you have 5 rows,
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