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# [powerprep] DS company employees

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Manager
Joined: 20 Jun 2005
Posts: 151
Followers: 1

Kudos [?]: 27 [0], given: 0

[powerprep] DS company employees [#permalink]  29 Jun 2007, 21:09
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
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Manager
Joined: 12 Apr 2007
Posts: 171
Followers: 1

Kudos [?]: 7 [0], given: 0

C

Let x = the number of employees

From S1, we get
x+3 >= 20, or
x >= 17

This is NSF as there are an inifinite number of values for x.

From S2, we get
x-3<15, or
x<18

This is NSF as x can be anything below 18.

Putting S1 and S2 together, we get 17 <= x < 18

The only value x can be is 17. Sufficient.
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