Left-handed persons suffer more frequently than do : GMAT Critical Reasoning (CR)
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# Left-handed persons suffer more frequently than do

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Left-handed persons suffer more frequently than do [#permalink]

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23 Jul 2010, 22:26
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Left-handed persons suffer more frequently than do right-handed persons from certain immune disorders, such as allergies. Left-handers tend to have an advantage over the right-handed majority, however, on task controlled by the right hemisphere of the brain, and mathematical reasoning is strongly under the influence of the right hemisphere in most people.

If the information above is true, it best supports which of the following hypotheses.
(A) Most people who suffer from allergies or other such immune disorders are left-handed rather than right-handed.

(B) Most left-handed mathematicians suffer from some kind of allergy.

(C) There are proportionally more left-handers among people whose ability to reason mathematically is above average than there are among people with poor mathematical reasoning ability.

(D) If a left-handed person suffers from an allergy, that person will probably be good at mathematics.

(E) There are proportionally more people who suffer from immune disorders such as allergies than there are people who are left-handed or people whose mathematical reasoning ability is unusually good.
[Reveal] Spoiler: OA
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Re: CR - GMAT PREP [#permalink]

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23 Jul 2010, 23:51
This is easy one !

Two premises. Avoid extreme choice and avoid choices which guarantee results. E.g. No, never etc

P1 :Left handed (LHP) personal suffer more frequently than do right-handed persons (RHP) from certain immune disorders (allergies)
P2 : LHP tend to have advantage over RH majority in activities such as mathematical reasoning

(A) Most people who suffer from allergies or other such immune disorders are left-handed rather than right-handed. >>> Y-> X. This is reverse of stimulus which says LHP have immune disorders/allergies. Wrong

(B) Most left-handed mathematicians suffer from some kind of allergy. >>> Extreme. Wrong

(C) There are proportionally more left-handers among people whose ability to reason mathematically is above average than there are among people with poor mathematical reasoning ability. >>> Lame so keep it. No contradictions.

(D) If a left-handed person suffers from an allergy, that person will probably be good at mathematics. >>> Y->X. Stimulus says that LHP have allergies. LHP tend to have good math reasoning. Does not mean allergies lead to good math reasoning. Wrong.

(E) There are proportionally more people who suffer from immune disorders such as allergies than there are people who are left-handed or people whose mathematical reasoning ability is unusually good. >>> Classical GMAT Comparison Trap. Stimulus doesn't even talk about this comparison. Wrong

C it is.
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Re: CR - GMAT PREP [#permalink]

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24 Jul 2010, 00:39
I think C too
in the other four choices, they kind of mess mathematical reasoning with immune disorders, when the argument doesn't tell us anything about the relationship bettwen them, so they're obvsiouly wrong
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Re: CR - GMAT PREP [#permalink]

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24 Jul 2010, 00:49
Good one.. I fell for E
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Re: CR - GMAT PREP [#permalink]

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02 Aug 2010, 04:54
A D E can be ruled out
B is extreme
C is best
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Re: CR - GMAT PREP [#permalink]

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02 Aug 2010, 07:33
Was wavering between E and C.Fell for E finally....
Re: CR - GMAT PREP   [#permalink] 02 Aug 2010, 07:33
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