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# A company has assigned a distinct 3-digit code number to

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Director
Joined: 14 Sep 2005
Posts: 984

Kudos [?]: 220 [0], given: 0

Location: South Korea
A company has assigned a distinct 3-digit code number to [#permalink]

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24 Nov 2005, 05:30
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A company has assigned a distinct 3-digit code number to each of its 330 employees. Each code number was formed from the digits 2, 3, 4, 5, 6,7 , 8, and 9. And no digit appears more than once in any one code number. How many unassigned code numbers are there?
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Kudos [?]: 220 [0], given: 0

Director
Joined: 24 Oct 2005
Posts: 658

Kudos [?]: 16 [0], given: 0

Location: London

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24 Nov 2005, 05:43
The first digit can be have 8 possibilities. Second digit 7 and 3rd digit 6.

ie total 8* 7 * 6 = 336

No. unassigned - 336 -330 = 6

Kudos [?]: 16 [0], given: 0

24 Nov 2005, 05:43
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