SOLUTION: How many five-digit zip codes contain exactly one zero?
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Question 356906
:
How many five-digit zip codes contain exactly one zero?
Answer by
Fombitz(32388)
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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,