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Everyone who has graduated from TopNotch High School has an intelligen

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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 12 May 2015, 21:49
ssriva2 wrote:
vscid wrote:
Everyone who has graduated from TopNotch High School has an intelligence quotient (IQ) of over 120. Most students with an IQ of over 120 and all students with an IQ of over 150 who apply to one or more Ivy League universities are accepted to at least one of them.

The statements above, if true, best support which of the following conclusions?

1]Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school.
2]If a person is a high-school graduate and has an IQ of less than 100, he or she could not have been a student at TopNotch High School.
3]If a person has an IQ of 130 and is attending an Ivy-League school, it is possible for him or her to have graduated from TopNotch High School.
4]At least one graduate from TopNotch high school who has applied to at least one Ivy-League university has been accepted to one of them.
5]If a high-school graduate has an IQ of 150 and is not attending an Ivy-League school, then he or she did not apply to one of them.



Can anyone guide why not A?
NEGATE:
NOT Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school.
(however we did not take the consideration of whether he applied or not. but then why the word "accepted")



This is an inference question, not an assumption question. Are you applying the negation technique to it? That works for assumption questions only.
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 14 May 2015, 08:47
Everyone who has graduated from TopNotch High School has an intelligence quotient (IQ) of over 120. Most students with an IQ of over 120 and all students with an IQ of over 150 who apply to one or more Ivy League universities are accepted to at least one of them.

The statements above, if true, best support which of the following conclusions?

1]Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school. We don't know if every graduate with an IQ of 150 applies to Ivy-League schools
2]If a person is a high-school graduate and has an IQ of less than 100, he or she could not have been a student at TopNotch High School. Graduates of TopNotch are the relevant population.
3]If a person has an IQ of 130 and is attending an Ivy-League school, it is possible for him or her to have graduated from TopNotch High School. Since the stimulus says that most graduates of TopNotch who have an IQ above 120 and apply to Ivy-League schools get in, this is the best answer choice.
4]At least one graduate from TopNotch high school who has applied to at least one Ivy-League university has been accepted to one of them. We don't have enough information to say this.
5]If a high-school graduate has an IQ of 150 and is not attending an Ivy-League school, then he or she did not apply to one of them. We are discussing TopNotch high-school graduates.
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 14 May 2015, 20:56
ssriva2 wrote:
yes,I was applying negation technique!
Is that not right?
:oops:


The name of the technique is assumption negation technique (ANT). It is used for assumption questions only. The logic of using the technique is this:

An assumption is a necessary missing premise. It is NECESSARY for the conclusion to hold. If the assumption is negated, the conclusion cannot hold. Hence, it is a check to see whether a statement is actually an assumption or not.

Check out how to use the ANT here:

http://www.veritasprep.com/blog/2013/03 ... -the-gmat/
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 06 Jun 2015, 13:26
what is the best approach to solve problems like these.
I always find multiple options correct in these kind of questions and it is very diffucult to select correct one within 2 mins.
Anybody can put down a sound approach to tackle problems like these ??
Thanks in advance.
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 09 Jun 2015, 01:49
282552 wrote:
what is the best approach to solve problems like these.
I always find multiple options correct in these kind of questions and it is very diffucult to select correct one within 2 mins.
Anybody can put down a sound approach to tackle problems like these ??
Thanks in advance.


In must be true questions, if you are not sure whether the statement must hold, try to find a case where it may not hold.
Try to make it false within the scope of the information given in the argument.

Argument:
Everyone who graduates from topnotch high school has IQ > 120.
Most > 120 and all > 150 students who apply get accepted to at least one Ivy league university.

For example, in option (B) above,

B]If a person is a high-school graduate and has an IQ of less than 100, he or she could not have been a student at TopNotch High School.

Now try to make this false. Can we have a high school graduate with IQ 100 who could have been a student at TopNotch? The important point here is "could have been". Sure. Perhaps she graduated from another school but could have been a student here before that. So it needn't be true - it could be false. She could have been a student at TopNOtch. So this is not the answer.
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 09 Jan 2016, 23:33
Hi EMPOWERgmatRichC

Could you please provide your comments on this.

I want to know what is the issue with option B?


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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 16 Jan 2016, 01:39
The argument states that everyone who has graduated from Top Notch High school has an IQ over 120. "B" states that if a person is a high school graduate and has an IQ of 100, he or she could not have been a student at Top Notch High school. The case might be that this student studied in Top Notch High school for a while and the then shifted to some other school from where he graduated. In that case the conclusion does not hold. Hence "B" cannot be a possible answer
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 19 Jan 2016, 00:13
PathFinder007 wrote:
Hi EMPOWERgmatRichC

Could you please provide your comments on this.

I want to know what is the issue with option B?


Regards

Hi PathFinder007,

This is an Inference question. To be 100% clear on our assignment with this question, we have to be able to look at the correct option and say, "yup, I know that for an absolute fact."

Let's pull up the salient points:
Everyone who has graduated from TopNotch High School has an intelligence quotient (IQ) of over 120. Most students with an IQ of over 120 and all students with an IQ of over 150 who apply to one or more Ivy League universities are accepted to at least one of them.

The statements above, if true, best support which of the following conclusions?

B) If a person is a high-school graduate and has an IQ of less than 100, he or she could not have been a student at TopNotch High School.

Is it possible that TopNotch could have had STUDENTS (not graduates) with IQs of less than 100? Yes. From the information we're given, we can't rule out that possibility. For all we know, TopNotch could have had a student with a 99 IQ who got booted from the program and never graduated. That means we have to get rid of option B.

Bigger Picture: There's a reason why this question is rated at a 95% difficulty quotient. The granularity of these options, particularly B, reaches an unusual level.
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 09 Oct 2016, 23:28
JenRugani wrote:
[], your explanations for this one are great! People still seem a little confused on A and D, so let's look at those one more time.

A) Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school.

We can't conclude that every graduate of TopNotch with a 150+ IQ has APPLIED to an Ivy-League school. If they apply, the argument tells us that they will be accepted to at least one, but there's nothing in the prompt to suggest that every 150+ student applies to at least one Ivy.

D) At least one graduate from TopNotch high school who has applied to at least one Ivy-League university has been accepted to one of them.

Let's say that every TopNotch graduate who applies to an Ivy-League school has an IQ between 120 and 150 (so nobody with a 150+ IQ applies). We only know that MOST students with a 120+ IQ who apply to an Ivy-League school are accepted to at least one. Therefore, there exists the possibility that nobody from TopNotch would be accepted to an Ivy, so D has to be eliminated.

Hope that helps for those two choices!


I am trying to understand why D) is incorrect.
We know that "Most students with an IQ of over 120 who apply to one or more Ivy League universities are accepted to at least one of them"
say 10 students from TopNotch high school (120<IQ<150) applied to one or more IVY league Universities, since most of them are accepted to at least one of them, we can expect at least 6(i.e. most of them) get accepted to one of the IVY leagues.
I see that C is a clear answer. But I am not able understand why D is wrong.
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Re: Everyone who has graduated from TopNotch High School has an intelligen  [#permalink]

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New post 20 May 2020, 18:10
Reading the passage, we have below info:
  • All TopNotch graduates has IQ > 120
  • Most students of IQ>120 who apply to >=1 Ivy League schools get accepted to by >=1
  • All students of IQ > 150 who apply to >=1 Ivy League schools get accepted by >=1

Quote:
(A) Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school.

Note the condition comes with 'who apply to", while this answer failed to include that piece of info, incorrect

Quote:
(B) If a person is a high-school graduate and has an IQ of less than 100, he or she could not have been a student at TopNotch High School.

Be careful with the shell game here: the first part of sentence use "graduate" while the 2nd part uses "student". It could be a student who studied at TopNotch but got transferred to another high school and graduated with IQ < 100, incorrect

Quote:
(C) If a person has an IQ of 130 and is attending an Ivy-League school, it is possible for him or her to have graduated from TopNotch High School.

"It is possible" signals this might be a good contender, and it suffices "all TopNotch graduates has IQ >120". Correct answer

Quote:
(D) At least one graduate from TopNotch high school who has applied to at least one Ivy-League university has been accepted to one of them.

Note we have a gap in given condition "Most students of IQ>120 who apply to >=1 Ivy League schools get accepted to by >=1". Let's say 80% of the students with IQ >120 and actually applied got accepted, there is still a chance (even though very low) that all TopNotch graduates fill in the rest 20% who failed.

Quote:
(E) If a high-school graduate has an IQ of 150 and is not attending an Ivy-League school, then he or she did not apply to one of them.

Shell game again: the answer said "not attending" while all given conditions emphasize "acceptance". The graduate could have been accepted but choose not to attend for whatever reason.
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Re: Everyone who has graduated from TopNotch High School has an intelligen   [#permalink] 20 May 2020, 18:10

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