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

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06 Mar 2010, 10:35

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A

B

C

D

E

Difficulty:

95% (hard)

Question Stats:

41% (02:19) correct
59% (01:18) wrong based on 1437 sessions

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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?

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.

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.

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.

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.

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!

@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!
_________________

Tough one. Got this one wrong. Thanks for the good explanation!
_________________

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