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 Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Left-handed persons suffer more frequently than do [#permalink]
04 Jan 2011, 13:04

3

This post received KUDOS

1

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

35% (medium)

Question Stats:

64% (02:43) correct
36% (09:34) wrong based on 225 sessions

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 mathemat- ics. (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.

The ans does not make sense to me. Please can someone explain this

Re: Left-handed persons suffer more frequently [#permalink]
04 Jan 2011, 13:29

I also wanted to know if these 2 types of questions are treated as inference types... Please can someone clarify.

If the information above is true, it best supports which of the following hypotheses? Which one of the following is best supported on the basis of the information above?

Re: Left-handed persons suffer more frequently [#permalink]
04 Jan 2011, 13:38

C is the answer.

(A) Most people who suffer from allergies or other such immune disorders are left-handed rather than right-handed. More frequently not most people. OUT (B) Most left-handed mathematicians suffer from some kind of allergy. mathematicians out of scope. (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. if left handers have a better control over the right hemisphere and this leads to the strong mathematical reasoning,then the proportion of the left-handed should be greater. (D) If a left-handed person suffers from an allergy, that person will probably be good at mathemat- ics. Definite statement.OUT (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. We don't know from the stem that there proportionally more people who suffer from immune disorders such as allergies.OUT

Re: Left-handed persons suffer more frequently [#permalink]
04 Jan 2011, 14:20

+1 C The key is being careful when you read the argument and the answer choice. Here is my explanation:

ajit257 wrote:

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. - "Most" is wrong. Maybe the proportions are 51% / 49%. (B) Most left-handed mathematicians suffer from some kind of allergy. - We are not talking about mathematicians; we are talking about math skills. (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. The argument tells us that left-handed people usually are better in math. Therefore, there are more left-handed people in the group of people good in math. CORRECT. (D) If a left-handed person suffers from an allergy, that person will probably be good at mathemat- ics. - The argument does not mention a causal relationship between allergies and maths skills. (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. - Tough one. Notice that the answer choice says "or"; in other words, you have to sum left-handed people plus people who are good in math. But you don't know how many they are as a result of that sum. Therefore, you cannot make the comparison of the answer choice. The ans does not make sense to me. Please can someone explain this

What do you think?

_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

Re: Left-handed persons suffer more frequently [#permalink]
05 Jan 2011, 07:40

metallicafan, I also wanted to know if this question "it best supports which of the following hypotheses?" is treated as inference then C is the most obvious choice but i still did not get wht is it got to do with immune disorders, such as allergies

Re: Left-handed persons suffer more frequently than do [#permalink]
11 Aug 2012, 06:36

1

This post received KUDOS

Expert's post

The key to this question is to not forget that the proportion between left-handers and right-handers is skewed. Therefore, just because lefties are more likely to have allergies then righties does not mean that if somebody has allergies he/she is more likely to be lefty. After all, if 90% of population is righty, then there are far more righties and we can't draw this conclusion. (C) takes this phenomenon into account. If lefties are stronger at math, then proportionally you will see more lefties in an above average math group than a below average group.

Re: Left-handed persons suffer more frequently than do [#permalink]
26 Oct 2013, 09:39

Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.

gmatclubot

Re: Left-handed persons suffer more frequently than do
[#permalink]
26 Oct 2013, 09:39