Left-handed persons suffer more frequently than do : GMAT Critical Reasoning (CR)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 20 Jan 2017, 09:17

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Left-handed persons suffer more frequently than do

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 05 Feb 2004
Posts: 290
Location: USA
Followers: 1

Kudos [?]: 5 [0], given: 0

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

### Show Tags

06 Apr 2004, 12:06
00:00

Difficulty:

(N/A)

Question Stats:

100% (02:05) correct 0% (00:00) wrong based on 2 sessions

### HideShow timer Statistics

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 tasks 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.

I am not sure about the answer.Got it from an old post.
If you have any questions
New!
Senior Manager
Joined: 23 Aug 2003
Posts: 461
Location: In the middle of nowhere
Followers: 1

Kudos [?]: 23 [0], given: 0

### Show Tags

06 Apr 2004, 12:12
Very confusing ....would like to go for D...

Vivek.
_________________

"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

Manager
Joined: 27 Feb 2004
Posts: 185
Location: illinois
Followers: 1

Kudos [?]: 25 [0], given: 0

### Show Tags

06 Apr 2004, 12:23
Should be C or E...Would go for C....
SVP
Joined: 30 Oct 2003
Posts: 1793
Location: NewJersey USA
Followers: 5

Kudos [?]: 98 [0], given: 0

### Show Tags

06 Apr 2004, 12:49
C should be it
I would like to know vivek's reasoning!!!
GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4302
Followers: 40

Kudos [?]: 429 [0], given: 0

### Show Tags

06 Apr 2004, 12:57
Took me a while but C is it. Again, here is a number example to prove my case:

Key sentence: Left-handers tend to have an advantage over the right-handed majority

We know from above that there are more right handed people than left handed people.
Let's say there are 90 right handed people and 10 left handed people for a total of 100.

Left-handers tend to have an advantage over the right-handed majority in terms of mathematics which is largerly controlled by the right part of the brain

Hence, let's say that 60% of left handers are above average in mathematics and 10% of right handers are above average in mathematics. This satifies the above premise and translates to:

6 left handed person good in math
9 right handed persons good in math

Quote:
There are proportionally more left-handers among people whose ability to reason mathematically is above average

The above means 6/ [9+6] = 40%

Quote:
than there are (left handers) among people with poor mathematical reasoning ability.

The above means [10-6] / [4+80] = 4.7%
[4+80] = people not good in math

Above two concur with what C means. As a matter of fact, this relationship can NEVER be violated and will ALWAYS hold true. Hence, C MUST be the answer
_________________

Best Regards,

Paul

Senior Manager
Joined: 23 Aug 2003
Posts: 461
Location: In the middle of nowhere
Followers: 1

Kudos [?]: 23 [0], given: 0

### Show Tags

06 Apr 2004, 13:03
All the other answers were very definitive and I thought from the stem you can't infer a definite conclusion so went for D which says..'will probably'....
Anyway I was lost...and after seeing Paul's explanation I can say I was 'completely' lost.

Vivek.
_________________

"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4302
Followers: 40

Kudos [?]: 429 [0], given: 0

### Show Tags

06 Apr 2004, 13:13
Sometimes, working out those "proportion vs number" problems, I find it better to back it up with numbers. However, does it complicate the problem more than it already is ?
_________________

Best Regards,

Paul

Senior Manager
Joined: 19 Feb 2004
Posts: 414
Location: Lungi
Followers: 1

Kudos [?]: 30 [0], given: 0

### Show Tags

07 Apr 2004, 03:05
B is the safest bet as it accounts for both the premises. Keyword is most.

rgds,
batli
Senior Manager
Joined: 05 Feb 2004
Posts: 290
Location: USA
Followers: 1

Kudos [?]: 5 [0], given: 0

### Show Tags

07 Apr 2004, 05:22
Paul, nice explanation..........I think it should be C....even older posts were leaning towards C but there aint a definite correct answer....thanks!!
07 Apr 2004, 05:22
Similar topics Replies Last post
Similar
Topics:
Left-handed persons suffer more frequently than do 6 29 Mar 2009, 17:28
1 Left-handed persons suffer more frequently than do 13 25 Mar 2009, 03:15
1 Left-handed persons suffer more frequently than do 11 05 Nov 2008, 22:18
Left-handed persons suffer more frequently than do 2 14 Mar 2008, 14:46
Left-handed persons suffer more frequently than do 5 06 Oct 2007, 13:50
Display posts from previous: Sort by