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Colfax Beta-80 is a rare genetic defect found primarily in

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Magoosh GMAT Instructor
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Colfax Beta-80 is a rare genetic defect found primarily in  [#permalink]

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New post 05 Jun 2013, 08:53
6
1
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D
E

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Question Stats:

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Colfax Beta-80 is a rare genetic defect found primarily in people of Scandinavian descent. Over 97% of known carriers of this defect have are citizens of, or are direct descendants of immigrants from, Denmark, Norway, and Sweden. People who carry the Colfax Beta-80 defect are at substantially higher risk for contracting Lupus and related autoimmune diseases.

Assuming the statements above are true, which of the following can be inferred from them?
(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.
(B) Genetic engineering that eradicated this genetic defect would constitute a de facto cure for Lupus.
(C) Find a cure for Lupus would eliminate most of the health threats associated with the Colfax Beta-80 defect.
(D) A person not of Scandinavian descent born with the Colfax Beta-80 defect is more likely to contract Lupus than is a Scandinavian who is born without this defect.
(E) The majority of people who contract Lupus are either Scandinavian or of Scandinavian descent
.

Some CR questions deal with the tricky issues of populations & proportions & percents. For a discussion of this genre, with common fallacies, as well as a full explanation of this question, see:
http://magoosh.com/gmat/2013/gmat-criti ... pulations/

Mike :-)

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Re: Colfax Beta-80 is a rare genetic defect found primarily  [#permalink]

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New post 05 Jun 2013, 09:59
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Colfax Beta-80 is a rare genetic defect found primarily in people of Scandinavian descent. Over 97% of known carriers of this defect have are citizens of, or are direct descendants of immigrants from, Denmark, Norway, and Sweden. People who carry the Colfax Beta-80 defect are at substantially higher risk for contracting Lupus and related autoimmune diseases.

Assuming the statements above are true, which of the following can be inferred from them?
(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.
(B) Genetic engineering that eradicated this genetic defect would constitute a de facto cure for Lupus.
(C) Find a cure for Lupus would eliminate most of the health threats associated with the Colfax Beta-80 defect.
(D) A person not of Scandinavian descent born with the Colfax Beta-80 defect is more likely to contract Lupus than is a Scandinavian who is born without this defect.
(E) The majority of people who contract Lupus are either Scandinavian or of Scandinavian descent[/color].

Some CR questions deal with the tricky issues of populations & proportions & percents. For a discussion of this genre, with common fallacies, as well as a full explanation of this question, see:
http://magoosh.com/gmat/2013/gmat-criti ... pulations/

Mike :-)

A) we have substantially higher risk VS higher risk and only this changes completely the scenario

B) What the genetic engeneering does is not our concern

C) wrong because is excactly the contrary

D) CORRECT

E) We talk about risk not who contract the Lupus

Good one :)
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Re: Colfax Beta-80 is a rare genetic defect found primarily  [#permalink]

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New post 05 Jun 2013, 12:33
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Detailed Explanation please, got confused big time between D and E and ultimately went for E :(
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Re: Colfax Beta-80 is a rare genetic defect found primarily  [#permalink]

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New post 05 Jun 2013, 13:17
IvyLeague56 wrote:
Detailed Explanation please, got confused big time between D and E and ultimately went for E :(

This this page for a detailed explanation:
http://magoosh.com/gmat/2013/gmat-criti ... pulations/
Mike :-)
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Colfax Beta-80 is a rare genetic defect found primarily in people of S  [#permalink]

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New post 12 Oct 2015, 10:50
Colfax Beta-80 is a rare genetic defect found primarily in people of Scandinavian descent. Over 97% of known carriers of this defect are citizens of, or are direct descendants of immigrants from, Denmark, Norway, and Sweden. People who carry the Colfax Beta-80 defect are at substantially higher risk for contracting Lupus and related autoimmune diseases.
Assuming the statements above are true, which of the following can be inferred from them?

(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.

(B) Genetic engineering that eradicated this genetic defect would constitute a de facto cure for Lupus.

(C) Find a cure for Lupus would eliminate most of the health threats associated with the Colfax Beta-80 defect.

(D) A person not of Scandinavian descent born with the Colfax Beta-80 defect is more likely to contract Lupus than is a Scandinavian who is born without this defect.

(E) The majority of people who contract Lupus are either Scandinavian or of Scandinavian descent.
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Re: Colfax Beta-80 is a rare genetic defect found primarily in  [#permalink]

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New post 13 Oct 2015, 13:59
tuanquang269 wrote:
Colfax Beta-80 is a rare genetic defect found primarily in people of Scandinavian descent. Over 97% of known carriers of this defect are citizens of, or are direct descendants of immigrants from, Denmark, Norway, and Sweden. People who carry the Colfax Beta-80 defect are at substantially higher risk for contracting Lupus and related autoimmune diseases.
Assuming the statements above are true, which of the following can be inferred from them?

(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.

(B) Genetic engineering that eradicated this genetic defect would constitute a de facto cure for Lupus.

(C) Find a cure for Lupus would eliminate most of the health threats associated with the Colfax Beta-80 defect.

(D) A person not of Scandinavian descent born with the Colfax Beta-80 defect is more likely to contract Lupus than is a Scandinavian who is born without this defect.

(E) The majority of people who contract Lupus are either Scandinavian or of Scandinavian descent.

Topics merged. tuanquang269, please search for a question before beginning a new thread.
Thank you,
Mike :-)
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Colfax Beta-80 is a rare genetic defect found primarily in  [#permalink]

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New post 20 Oct 2015, 10:04
  • Colfax Beta-80 is a rare genetic defect found primarily in people of Scandinavian descent.
  • Over 97% of known carriers of this defect have are citizens of, or are direct descendants of immigrants from, Denmark, Norway, and Sweden.
  • People who carry the Colfax Beta-80 defect are at substantially higher risk for contracting Lupus and related autoimmune diseases


Assuming the statements above are true, which of the following can be inferred from them?

(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.
(B) Genetic engineering that eradicated this genetic defect would constitute a de facto cure for Lupus...............nothing of this sort is mentioned in the argument. There is no mention of defect eradication.
(C) Find a cure for Lupus would eliminate most of the health threats associated with the Colfax Beta-80 defect.........cure for Lupus is neither mentioned nor discussed
(D) A person not of Scandinavian descent born with the Colfax Beta-80 defect is more likely to contract Lupus than is a Scandinavian who is born without this defect.
(E) The majority of people who contract Lupus are either Scandinavian or of Scandinavian descent.............we are not sure of this since we only know majority of people with defect are from Scandinavian descent. And these may contain high risk of contracting Lupus but need not contract Lupus compulsorily.

chose A out of A and D. :cry:

Important lesson wrote:
Most folks with this genetic defect are Scandinavian, but that doesn’t imply that most Scandinavian people have this defect. People with the defect are at higher risk for Lupus, but that doesn’t mean large sections of the Scandinavian population are at risk for Lupus.
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Colfax Beta-80 is a rare genetic defect found primarily in  [#permalink]

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New post 09 May 2018, 06:30

Official Explanation


The prompt tells us that Colfax Beta-80 is a genetic defect. Most of the folks who have this defect are Scandinavian, but we don't know what percent of Scandinavians have this defect. It may be a substantial portion, but that's unlikely because the defect is "rare." Much more likely: there only be a couple hundred people in the whole world who have this defect, and 97% of this couple hundred are from Scandinavia ---- a large percentage among those with the defect, but not a large percentage among the Scandinavian population as a whole. A couple answer choices conflate these two percentages.

Anyone with this defect is at higher risk for Lupus and other autoimmune diseases.

(D) is the credited answer. This more or less restates the information of the last sentence. Anyone with this defect (Scandinavian or not) has a substantially higher risk of Lupus compared to anyone without the defect (Scandinavian or not).

(A) & (E) play on the misunderstanding about what the 97% implies. Most folks with this genetic defect are Scandinavian, but that doesn’t imply that most Scandinavian people have this defect. People with the defect are at higher risk for Lupus, but that doesn't mean large sections of the Scandinavian population are at risk for Lupus.

(B) is wrong because, while we are told this genetic defect causes susceptibility to Lupus, we don't know what other factors might cause or contribute to Lupus. Just because we eliminate this one factor does not mean we would eliminate everything in the world that could possibly contribute to the onset of Lupus.

(C) is wrong because, while we are told this genetic defect causes Lupus, we are also told it causes other autoimmune diseases. Even if we had a cure for Lupus, these other autoimmune diseases would still poses health threats to carriers of the defect.
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Re: Colfax Beta-80 is a rare genetic defect found primarily in  [#permalink]

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New post 27 Oct 2018, 18:16
mikemcgarry wrote:
Colfax Beta-80 is a rare genetic defect found primarily in people of Scandinavian descent. Over 97% of known carriers of this defect have are citizens of, or are direct descendants of immigrants from, Denmark, Norway, and Sweden. People who carry the Colfax Beta-80 defect are at substantially higher risk for contracting Lupus and related autoimmune diseases.

Assuming the statements above are true, which of the following can be inferred from them?
(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.
(B) Genetic engineering that eradicated this genetic defect would constitute a de facto cure for Lupus.
(C) Find a cure for Lupus would eliminate most of the health threats associated with the Colfax Beta-80 defect.
(D) A person not of Scandinavian descent born with the Colfax Beta-80 defect is more likely to contract Lupus than is a Scandinavian who is born without this defect.
(E) The majority of people who contract Lupus are either Scandinavian or of Scandinavian descent
.

Some CR questions deal with the tricky issues of populations & proportions & percents. For a discussion of this genre, with common fallacies, as well as a full explanation of this question, see:
http://magoosh.com/gmat/2013/gmat-criti ... pulations/

Mike :-)


GMAT likes to play with quantity and percentage, makes different traps.
I will add a little about A and E (especially A) (B, C are obviously out).
(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.
So, Beta-80 is rare ---> small amount of such people. It is bad for lupus. Yes, Sure.
But maybe there is another defect (XXX) and (it is not that rare in another country) there a lot of such people in Germany for example, and this XXX is bad for lupus too.
So people from Germany are at higher risk for Lupus than people of Denmark ---> A is wrong.
(Same logic applies to E)

So D
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Re: Colfax Beta-80 is a rare genetic defect found primarily in &nbs [#permalink] 27 Oct 2018, 18:16
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Colfax Beta-80 is a rare genetic defect found primarily in

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