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Everyone who has graduated from TopNotch High School has an [#permalink]
08 Apr 2008, 19:45

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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?

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

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

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.

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.

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.

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.

Re: Hard Critical Reasoning [#permalink]
08 Apr 2008, 20:16

madcowudub 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?

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

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

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.

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.

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.

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.

Re: Hard Critical Reasoning [#permalink]
08 Apr 2008, 20:28

madcowudub 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?

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

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

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.

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.

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.

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.

I went with A Here is the argument: All TN has ">120" Most ">120" & All ">150" => accepted to at least 1 Ivy

D is incorrect because all graduates of TN may have less than 150 IQ and they may be the unfortunate ones who do not fall in to "most >120" A, B, C, E are all plausible answers. However, I feel that A conclude best.

Re: Hard Critical Reasoning [#permalink]
08 Apr 2008, 20:33

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C A. Assumes that every graduate with an iq of 150 has applied to an ivy league school B. Maybe a student with an IQ of 100 could have started at Top Notch and then transfered to another school to graduate D. No way to prove this E. Maybe the student could have applied to Ivy league schools, been accepted, and then decided to attend a different school

Re: Hard Critical Reasoning [#permalink]
09 Apr 2008, 07:38

Definitely C

D is wrong because if everyone from Top HS X has 120-149 IQ, then it is possible that none of them got accepted to an IVy league school A is wrong because it is possible that none of them applied, therefore, none of them got accepted.

Re: Hard Critical Reasoning [#permalink]
09 Apr 2008, 21:26

Make clear why C is wrong!

Given logic flow that

If A, then B

Correct reference: If not B, then not A

Any one of the two below all wrong references:

1. if B, then A 2. if not A, then not B

Apply to C choice, you will find that C belong to 1 case of wrong references

In real words, nothing can garantee that if a person "with IQ of 130 and is attending an Ivy-League school" graduated from "TopNotch High School". One can graduate from Europe school, china school, or anything esle.

Re: Hard Critical Reasoning [#permalink]
09 Apr 2008, 23:11

sondenso wrote:

Make clear why C is wrong!

Given logic flow that

If A, then B

Correct reference: If not B, then not A

Any one of the two below all wrong references:

1. if B, then A 2. if not A, then not B

Apply to C choice, you will find that C belong to 1 case of wrong references

In real words, nothing can garantee that if a person "with IQ of 130 and is attending an Ivy-League school" graduated from "TopNotch High School". One can graduate from Europe school, china school, or anything esle.

Re: Hard Critical Reasoning [#permalink]
09 Apr 2008, 23:43

sondenso wrote:

Make clear why C is wrong!

Given logic flow that

If A, then B

Correct reference: If not B, then not A

Any one of the two below all wrong references:

1. if B, then A 2. if not A, then not B

Apply to C choice, you will find that C belong to 1 case of wrong references

In real words, nothing can garantee that if a person "with IQ of 130 and is attending an Ivy-League school" graduated from "TopNotch High School". One can graduate from Europe school, china school, or anything esle.

So C can not be true!

Well, what is nice about C is that it only talks about possibility of the event instead of stating the fact. It only says "it is possible for him or her to have graduated from TopNotch High School."

C is the best answer here. Other answer choices state the facts that can be proved to be wrong.. Let's see:

A.) Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school. -- we only know that their IQ is over 120.. It can be possible that no one, who graduated from TopNotch High School has IQ of 150

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. -- why not? There could be some students, who simply did not graduate

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. - This one should be OA

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. -- we do not know if anyone actually applied to Ivy-League universities.. There is also a possibility that graduates of TopNotch high school were not among those "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." 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. -- a high-school graduate could simply decide not to attend an Ivy-League school after he or she was accepted.

Re: Hard Critical Reasoning [#permalink]
09 Apr 2008, 23:57

kazakhb wrote:

but C says that possible graduated not graduated

chica wrote:

we do not know if anyone actually applied to Ivy-League universities.. There is also a possibility that graduates of TopNotch high school were not among those "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."

Thanks Chica and kazakhb, I like all of you , I found my error. The too general reading is my weakness in CR, SC and RC.

Re: Hard Critical Reasoning [#permalink]
10 Apr 2008, 04:21

chica wrote:

sondenso wrote:

Make clear why C is wrong!

Given logic flow that

If A, then B

Correct reference: If not B, then not A

Any one of the two below all wrong references:

1. if B, then A 2. if not A, then not B

Apply to C choice, you will find that C belong to 1 case of wrong references

In real words, nothing can garantee that if a person "with IQ of 130 and is attending an Ivy-League school" graduated from "TopNotch High School". One can graduate from Europe school, china school, or anything esle.

So C can not be true!

Well, what is nice about C is that it only talks about possibility of the event instead of stating the fact. It only says "it is possible for him or her to have graduated from TopNotch High School."

C is the best answer here. Other answer choices state the facts that can be proved to be wrong.. Let's see:

A.) Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school. -- we only know that their IQ is over 120.. It can be possible that no one, who graduated from TopNotch High School has IQ of 150

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. -- why not? There could be some students, [color=#BF0000]who simply did not graduate[/color]

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. - This one should be OA

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. -- we do not know if anyone actually applied to Ivy-League universities.. There is also a possibility that graduates of TopNotch high school were not among those "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." 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. -- a high-school graduate could simply decide not to attend an Ivy-League school after he or she was accepted.

I dont see any issue with C. But I have a doubt with B.

Re: Hard Critical Reasoning [#permalink]
11 Apr 2008, 00:22

farend wrote:

chica wrote:

sondenso wrote:

Make clear why C is wrong!

Given logic flow that

If A, then B

Correct reference: If not B, then not A

Any one of the two below all wrong references:

1. if B, then A 2. if not A, then not B

Apply to C choice, you will find that C belong to 1 case of wrong references

In real words, nothing can garantee that if a person "with IQ of 130 and is attending an Ivy-League school" graduated from "TopNotch High School". One can graduate from Europe school, china school, or anything esle.

So C can not be true!

Well, what is nice about C is that it only talks about possibility of the event instead of stating the fact. It only says "it is possible for him or her to have graduated from TopNotch High School."

C is the best answer here. Other answer choices state the facts that can be proved to be wrong.. Let's see:

A.) Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school. -- we only know that their IQ is over 120.. It can be possible that no one, who graduated from TopNotch High School has IQ of 150

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. -- why not? There could be some students, [color=#BF0000]who simply did not graduate[/color]

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. - This one should be OA

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. -- we do not know if anyone actually applied to Ivy-League universities.. There is also a possibility that graduates of TopNotch high school were not among those "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." 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. -- a high-school graduate could simply decide not to attend an Ivy-League school after he or she was accepted.

I dont see any issue with C. But I have a doubt with B.

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. >> There could be some students, who started their education at TopNotch high school but under certain circumstances (moved to other state and etc) graduated from other high school. So it is possible for a high-shool graduate to have been a student of TopNotch but did not graduate from TopNotch shool. Hope, this example is better

gmatclubot

Re: Hard Critical Reasoning
[#permalink]
11 Apr 2008, 00:22