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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 08 Sep 2009, 11:35
2
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

62% (01:26) correct 38% (00:20) wrong based on 42 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
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Re: If two copying machines work simultaneously [#permalink] New post 08 Sep 2009, 12:07
saruba wrote:
IMO C


even i marked the same answer, but the answer given is something else...
let us wait for few more response....
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Re: If two copying machines work simultaneously [#permalink] New post 08 Sep 2009, 12:16
I think E is the answer

gurpreet07 wrote:
saruba wrote:
IMO C


even i marked the same answer, but the answer given is something else...
let us wait for few more response....
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Re: If two copying machines work simultaneously [#permalink] New post 08 Sep 2009, 12:19
Ok I understand,
we don't know which machine is which, I mean, the machine that produces 250 could be the same which produces twice the other machine.
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Re: If two copying machines work simultaneously [#permalink] New post 12 Sep 2009, 20:52
1, Insuf ->B,C,E
2, alone insuff -> C,E
1&2: 2 values - 1 machine 250, other 125
- 1 machine 250, other 500
-> E
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Re: If two copying machines work simultaneously [#permalink] New post 12 Sep 2009, 23:09
Mikko wrote:
1, Insuf ->B,C,E
2, alone insuff -> C,E
1&2: 2 values - 1 machine 250, other 125
- 1 machine 250, other 500
-> E



Nice explantion....yes the OA is E
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Re: If two copying machines work simultaneously [#permalink] New post 19 Sep 2009, 11:57
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.

IMO E....let's say two machines A and B

1. A = 250/minute no relation between A and B => NS
2. A=2B or B=2A => NS

combining

we don't know A=250 or B=250 NS

Ans = > E

OA please
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Re: If two copying machines work simultaneously [#permalink] New post 20 Sep 2009, 03:28
Statement 1 : insuff.

Statement 2: insuff,since the rate of other machine can be either 125 or 500.insuff

So I wud go with option E
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Re: If two copying machines work simultaneously at their [#permalink] New post 03 Jan 2012, 10:48
Very critical question.
E is the right answer.
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Re: If two copying machines work simultaneously at their [#permalink] New post 03 Jan 2012, 10:57
Excellent question.
1. Clearly insufficient
2. No rate of one of the machines specified, so insufficient

Together, the two machines could be:
a. 250 cpm, 125 cpm
b. 250 cpm, 500 cpm
insufficient

So, E.
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Re: If two copying machines work simultaneously at their   [#permalink] 03 Jan 2012, 10:57
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