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Gambler: The odds of rolling a three with a fair die is one

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Gambler: The odds of rolling a three with a fair die is one [#permalink] New post 16 Dec 2010, 09:54
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A
B
C
D
E

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(N/A)

Question Stats:

25% (02:32) correct 75% (02:15) wrong based on 4 sessions
Gambler: The odds of rolling a three with a fair die is one out of six. If I roll two dice, I double my opportunities to roll a three, because on a roll of two dice, the chances of rolling at least one three are two out of six, and if I roll three dice the odds increase to three of six, and so on. My odds keep increasing until I roll six dice, and then I’ll definitely have my three.

Mathematician: Your conclusion cannot be valid, since it would mean that it is impossible to roll six dice without rolling a three.

Which of the following argumentative strategies is used by the mathematician in response to the gambler?

undermining the gambler’s credibility by questioning his understanding of mathematics

arguing that the theory derived by the gambler would lead to an absurdly false conclusion

calling the validity of the gambler’s initial premise into question

stating a general principle that contradicts the gambler’s conclusion

pointing out, at what juncture, the gambler went wrong in his calculation
[Reveal] Spoiler: OA

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Re: probability in CR :D [#permalink] New post 16 Dec 2010, 12:26
Hi Shrive555,

It would be more useful if you add the answers later after some discussions.

The only two choices which appealed me were B and D.

I selected B because :

i). "arguing" vs "stating". Here the Mathematician is arguing by answering the Gambler that his conclusion is invalid.
ii). The theory proposed by the gambler leads to the impossible conclusion : that he will get 3 no matter what.
iii). The Mathematician never states any general principle - as suggested in D.

Thanks
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Re: probability in CR :D [#permalink] New post 16 Dec 2010, 15:39
Great question, Shrive - maybe I like it because it blends GMAT Critical Reasoning with GMAT Probability...it's a Verbal question that includes GMAT quant!

I agree with anshumishra - and I'll point out that when questions ask for a description of logic, the most popular wrong answers are "partially correct" and therefore tempting. You need the right answer to be 100% correct. A for example, is halfway right - he does undermine the gambler's credibility, but not by questioning his knowledge of math but rather by pointing out an absurd conclusion that would result from his point.
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 08:02
PLEASE TAG THE SOURCE
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Last edited by Zatarra on 17 Dec 2010, 10:54, edited 1 time in total.
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 09:47
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PLEASE TAG THE SOURCEPLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE PLEASE TAG THE SOURCE


Take it easy dude !!!
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 10:04
PLEASE TAG THE SOURCE
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 10:21
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mundasingh123 wrote:
PLEASE TAG THE SOURCE

Take it easy dude !!!
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 10:42
ulm wrote:
mundasingh123 wrote:
PLEASE TAG THE SOURCE

Take it easy dude !!!

Kudos to both
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 10:46
ulm wrote:
mundasingh123 wrote:
PLEASE TAG THE SOURCE

Take it easy dude !!!

Am i doing anything wrong by insisting that people follow guidelines.I am sure a lot of people would agree with me. If that is the case then i quit .
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 10:49
ulm wrote:
mundasingh123 wrote:
PLEASE TAG THE SOURCE

Take it easy dude !!!

Am i doing anything wrong by insisting that people follow guidelines per se the sticky post by whiplash.I am sure a lot of people would agree with me because then people would be able to avoid Gmatprep questions.Since this is a democratic forum, of course people have the right to post as they please. If that is the case then i must take it easy.
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My Post Invites Discussions not answers
Try to give back something to the Forum.I want your explanations, right now !
Please let me know your opinion about the Chandigarh Gmat Centrehttp://gmatclub.com/forum/gmat-experience-at-chandigarh-india-centre-111830.html

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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 11:51
mundasingh123 wrote:
ulm wrote:
mundasingh123 wrote:
PLEASE TAG THE SOURCE

Take it easy dude !!!

Am i doing anything wrong by insisting that people follow guidelines per se the sticky post by whiplash.I am sure a lot of people would agree with me because then people would be able to avoid Gmatprep questions.Since this is a democratic forum, of course people have the right to post as they please. If that is the case then i must take it easy.



Source: Magoosh.com
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Re: probability in CR :D [#permalink] New post 17 Dec 2010, 13:02
anshumishra wrote:
Hi Shrive555,

It would be more useful if you add the answers later after some discussions.

The only two choices which appealed me were B and D.

I selected B because :

i). "arguing" vs "stating". Here the Mathematician is arguing by answering the Gambler that his conclusion is invalid.
ii). The theory proposed by the gambler leads to the impossible conclusion : that he will get 3 no matter what.
iii). The Mathematician never states any general principle - as suggested in D.

Thanks


What is the difference b/n arguing and stating in this question EXACTLY? The Mathematician is arguing indeed but he is also stating.
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Re: probability in CR :D   [#permalink] 17 Dec 2010, 13:02
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