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# M14, Q24

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Manager
Joined: 10 Jan 2010
Posts: 120

Kudos [?]: 146 [0], given: 33

GPA: 4
WE: Programming (Computer Software)

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19 Nov 2011, 19:20
If B, E , and A are not zeros, do lines Ax + By = C and Dx + Ey = F have the same slope?

A/B=D/E
E/B=D/A

The OA for this question is "D". But the question does not talk about "D", hence it can be zero. If D = 0 then D/E will be zero whereas A/B will not be zero (Since A, B are not zero's).

Hence i choose "E". Can somebody explain the logic behind the OA.

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Kudos [?]: 146 [0], given: 33

Intern
Joined: 20 Mar 2011
Posts: 1

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

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19 Nov 2011, 23:16
A/B=D/E. While A#0 --> D #0.
E/B=D/A. While E#0 --> D #0.

Posted from my mobile device

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

Manager
Status: Bell the GMAT!!!
Affiliations: Aidha
Joined: 16 Aug 2011
Posts: 177

Kudos [?]: 81 [0], given: 43

Location: Singapore
Concentration: Finance, General Management
GMAT 1: 680 Q46 V37
GMAT 2: 620 Q49 V27
GMAT 3: 700 Q49 V36
WE: Other (Other)

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21 Nov 2011, 10:13
Isn't it an unstated rule that if both the options are deadly twins, the answer is E. Or is it that this rule is ignored when we can find the answer using the options?

Can experts please comment as I intend to use this rule straighaway when I see deadly twins.
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Kudos [?]: 81 [0], given: 43

Intern
Joined: 25 Aug 2011
Posts: 22

Kudos [?]: 3 [0], given: 56

Concentration: Entrepreneurship, General Management
GMAT Date: 01-31-2012

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17 Apr 2012, 08:52
Initially went with answer D, but now, considering that it is also possible that D=0 i think that the answer should be E.......

what do you think? In these kind of questions, should I consider that 0 can be the numerator or not?

thanks

Kudos [?]: 3 [0], given: 56

Intern
Joined: 14 Jan 2012
Posts: 14

Kudos [?]: 1 [0], given: 13

GMAT 1: 600 Q45 V28
GMAT 2: 700 Q48 V38

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26 Aug 2012, 01:50
Saurajm wrote:
Initially went with answer D, but now, considering that it is also possible that D=0 i think that the answer should be E.......

what do you think? In these kind of questions, should I consider that 0 can be the numerator or not?

thanks

If D=0 then statement 1 will not be true. But, we have to consider that statements are true. Therefore, D cannot be 0.

Kudos [?]: 1 [0], given: 13

Re: M14, Q24   [#permalink] 26 Aug 2012, 01:50
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# M14, Q24

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