If two copying machines work simultaneously at their : GMAT Data Sufficiency (DS)
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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]

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28 Jan 2012, 03:01
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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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28 Jan 2012, 03:13
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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: If two copying machines work simultaneously at their [#permalink]

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04 Oct 2014, 09:08
Fell for the trap , one of the machines could mean either !!
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25 Jul 2016, 08:41
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Re: If two copying machines work simultaneously at their [#permalink]

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25 Jul 2016, 23:52
very tricky and good question,

1) insuff .dont have info about 2nd machine
2) insuff again.dont have value for either machine's rate.

1+2, a bit tricky,

two cases :
1) 1st machine =250 ,2nd machine=500
2)1st machine =250, 2nd machine=125

Re: If two copying machines work simultaneously at their   [#permalink] 25 Jul 2016, 23:52
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