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If Nicole worked 20% more this week than she worked last

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If Nicole worked 20% more this week than she worked last [#permalink] New post 20 Jun 2011, 21:16
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A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

86% (01:15) correct 14% (01:20) wrong based on 7 sessions
If Nicole worked 20% more this week than she worked last week, how many hours did she work last week?

(1) Nicole worked 36 hours this week.

(2) Nicole worked 6 more hours this week than she worked last week.
[Reveal] Spoiler: OA

Last edited by siddhans on 20 Jun 2011, 21:28, edited 1 time in total.
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Re: MGMAT DS [#permalink] New post 20 Jun 2011, 21:20
Let Nicole's work hours be H last week

(1) Nicole worked 36 hours this week.

So 36 = 1.2H
=> H = 30 hrs

Sufficient


(2) Nicole worked 6 more hours this week than she worked last week.


1.2H - H = 6

=> 0.2H = 6

=> H = 6 * 10/2

=> H = 30 hrs

Sufficient

Answer - D
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Re: MGMAT DS   [#permalink] 20 Jun 2011, 21:20
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If Nicole worked 20% more this week than she worked last

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