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2002 AMC 12B
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The arithmetic mean of the nine numbers in the set
{
9
,
99
,
999
,
9999
,
…
,
999999999
}
\{9, 99, 999, 9999, \ldots, 999999999\}
{
9
,
99
,
999
,
9999
,
…
,
999999999
}
is a 9-digit number
M
M
M
, all of whose digits are distinct. The number
M
M
M
does not contain the digit
A
0
B
2
C
4
D
6
E
8
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