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Everyone who has graduated from TopNotch High School has an

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Everyone who has graduated from TopNotch High School has an [#permalink] New post 06 Mar 2010, 09:35
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A
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38% (02:13) correct 62% (01:15) wrong based on 413 sessions
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.
[Reveal] Spoiler: OA

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Last edited by WaterFlowsUp on 11 Oct 2013, 20:24, edited 1 time in total.
OA Added
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Re: Top notch [#permalink] New post 06 Mar 2010, 09:51
IMO B.
As per the argument
Quote:
Everyone who has graduated from TopNotch High School has an intelligence quotient (IQ) of over 120

Now B is always true
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Re: Top notch [#permalink] New post 07 Mar 2010, 13:39
I´ll go for B.
OA please?
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Re: Top notch [#permalink] New post 08 Mar 2010, 09:01
I am still thinking between B and E. Both statements looks like good conclusions.

I will vote for E.

OA please?
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Re: Top notch [#permalink] New post 08 Mar 2010, 10:28
IMHO E.

Its a possibility that some students may have been students of top Notch at some time but not graduated from the Top Notch school. So IMO B is out.
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Re: Top notch [#permalink] New post 08 Mar 2010, 11:55
Got it from another forum:

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.

The negative statements are an attempt to flip the positive premise "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"

(E) is not a valid GMAT conclusion because of not only the mismatch between exactly 150 and over 150, but also the mismatch between attending and being accepted at an Ivy-League school.

The OA is C.
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Re: Top notch [#permalink] New post 09 Mar 2010, 03:43
OA is
[Reveal] Spoiler:
C
.

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Re: Top notch [#permalink] New post 11 Mar 2010, 06:45
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I am surprised that I picked the right answer for this CR. I picked (C)

My reasoning is below

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.
>>> Every graduate of TopNotch HS will get accepted only if everyone applies. A graduate can get an IQ of 150 but still decide not to apply.

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.
>>> We are talking of students graduated from TopNotch High School and not students who were at TopNotch High School. It is quite possible that a student studied at TopNotch High School for few years and then changed HighSchool and got less than 100 when he or she graduated. He/she will still be called as someone who was 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.
>>> THIS IS CORRECT.

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.
>>> Not necessarily.

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.
>>> The premise says all students with an IQ of over 150 will get accepted. So we cannot say that a student who has an IQ of 150 will get accepted and that if he is not attending than that is because he did not apply.
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Re: Top notch [#permalink] New post 16 Oct 2010, 11:37
i choose a but didnt realize the error which is "Ivy-League school"
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Re: Top notch [#permalink] New post 16 Oct 2010, 13:40
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.

I picked C.

I was down to choice between B and C.
It's not B because it doesn't take the information given about Ivy-league schools into consideration.
C is better choice than B because it doesn't give an absolute answer about the student (like everyone with an IQ above 120 can be an Ivy league student). It uses the term "it is possible for him or her..." which makes it more likely than B.
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Re: Top notch [#permalink] New post 16 Oct 2010, 13:41
seekmba wrote:
I am surprised that I picked the right answer for this CR. I picked (C)

My reasoning is below

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.
>>> Every graduate of TopNotch HS will get accepted only if everyone applies. A graduate can get an IQ of 150 but still decide not to apply.

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.
>>> We are talking of students graduated from TopNotch High School and not students who were at TopNotch High School. It is quite possible that a student studied at TopNotch High School for few years and then changed HighSchool and got less than 100 when he or she graduated. He/she will still be called as someone who was 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.
>>> THIS IS CORRECT.

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.
>>> Not necessarily.

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.
>>> The premise says all students with an IQ of over 150 will get accepted. So we cannot say that a student who has an IQ of 150 will get accepted and that if he is not attending than that is because he did not apply.

your explanation against B is more valid than mine. Thanks!
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Re: Top notch [#permalink] New post 16 Oct 2010, 14:59
Wow I completely missed this one. I was between B and E. Good questions or bad, cant really decide
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Re: Top notch [#permalink] New post 17 Oct 2010, 05:47
first replies worried me as I had chosen C :D in 3 min though :/
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Re: Top notch [#permalink] New post 30 Oct 2010, 14:29
+1 C 8-)
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Re: Top notch [#permalink] New post 30 Oct 2010, 19:10
How about A? Plz explain
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Re: Top notch [#permalink] New post 30 Oct 2010, 22:11
lost in C and D ..somebody please xplain how to eliminate D
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Re: Top notch [#permalink] New post 01 Nov 2010, 09:02
+ C
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Re: Top notch [#permalink] New post 05 Nov 2010, 08:15
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@seekmba, 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!
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Re: Top notch [#permalink] New post 27 Nov 2010, 17:29
Tough one. Got this one wrong. Thanks for the good explanation!
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Re: Top notch [#permalink] New post 23 Jun 2011, 18:04
Manhattan GMAT has labelled this as a 700-800 level question. This one is tough.
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Re: Top notch   [#permalink] 23 Jun 2011, 18:04
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