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If two copying machines work simultaneously at their

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If two copying machines work simultaneously at their [#permalink] New post 28 Jan 2012, 03:01
00:00
A
B
C
D
E

Difficulty:

  25% (low)

Question Stats:

63% (01:27) correct 36% (00:36) wrong based on 66 sessions
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?

(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.
[Reveal] Spoiler: OA

Last edited by Bunuel on 27 Feb 2012, 03:47, edited 2 times in total.
Added the OA and moved to DS subforum.
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Re: Work [#permalink] New post 28 Jan 2012, 03:13
Expert's post
RadhaKrishnan wrote:
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?
(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.


Straight E, though a little bit tricky. All we need to know is the rates of these machines. Though from both statement the rates can be:
250 copies per minute and 500 copies per minute;
250 copies per minute and 125 copies per minute.

P.S. Please post PS questions in the PS subforum: gmat-problem-solving-ps-140/ and DS questions in the DS subforum: gmat-data-sufficiency-ds-141/
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Re: Work   [#permalink] 28 Jan 2012, 03:13
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