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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 26 Aug 2007, 11:28
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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?

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.
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 [#permalink] New post 26 Aug 2007, 14:06
C.

B was tempting but just because the person was a student at TopNotch doesn't mean that person graduated from TopNotch. The person could have transferred to and graduated from another high school.
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 [#permalink] New post 26 Aug 2007, 14:13
I will go with C as well eventhough I almost went for B. It is better to avoid absolute statements in such CRs.
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 [#permalink] New post 26 Aug 2007, 22:16
I go for B.
B says he is already a high school graduate. I think its safe to assume that he wont attend school again :P

EDIT : I am sorry. He need not have graduated from that school. Yeah. C makes more sense.
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 [#permalink] New post 27 Aug 2007, 04:28
OA C
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 [#permalink] New post 27 Aug 2007, 08:18
Piter wrote:
OA C


Whats the OE for this. The contrapositive seems to be right for this. B is the contrapositive
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 [#permalink] New post 27 Aug 2007, 16:01
dahcrap wrote:
Piter wrote:
OA C


Whats the OE for this. The contrapositive seems to be right for this. B is the contrapositive

OE
Quote:
Since the passage contains information about both TopNotch High School graduates and those accepted to Ivy League universities, a valid conclusion must contain information that does not contradict either situation. In addition, a valid conclusion must remain true for every possible situation compatible with the passage. In contrast, a conclusion can be shown to be invalid if it can be demonstrated that a situation can occur that does not contradict the passage, but contradicts the given conclusion. Be careful not to make unwarranted assumptions: for example, a person who attends a school does not necessary graduate from it, a person who graduates from high school does not necessarily apply to a university, and a person who is accepted to a university does not necessarily attend it.

(A) The passage states that every student with an IQ of 150 who applies to the Ivy League will be accepted by at least one of the universities. However, it is possible that a graduate of TopNotch High with an IQ of 150 did not apply, and thereby was not accepted, to any of the schools. Hence, this conclusion is not valid.

(B) The passage states that every graduate of TopNotch High has an IQ of over 120. The conclusion only states that the student is a high school graduate and that he has an IQ of less than 120. It does NOT state that he or she was a graduate of TopNotch High. It is possible, however, that after attending TopNotch High for a period of time, he or she graduated from another high school. If this is the case, the situation does not contradict the passage, but contradicts the conclusion (he or she was a student at TopNotch High). Hence, this conclusion is not valid.

(C) CORRECT. Nothing in the passage precludes a person who is a graduate of TopNotch High from having an IQ of 130 and from attending an Ivy League university. Neither does anything in the passage preclude a person who has an IQ of 130 and is attending an Ivy League school to have graduated from TopNotch High. Therefore, it is possible for both situations to exist simultaneously, so the conclusion is valid.

(D) The conclusion states that most, but not necessarily all, of the graduates from TopNotch High with IQ of 120 who apply to the Ivy League are accepted by at least one of the school. The conclusion, however, does not state positively that any of the TopNotch High graduates had an IQ of over 150. Hence, even if it is unlikely, it is possible that none of the TopNotch graduates had IQ of over 150, and, of the remaining graduates who applied to the Ivy League, none were accepted to an Ivy League university. This conclusion is thereby not valid.

(E) The passage states that any student with an IQ of 150 who applies to one or more Ivy League universities will be accepted to at least one of them. It is possible, however, that some of those who had applied and been accepted to an Ivy League university chose not to attend. Hence, this conclusion is not valid.
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Re: CR IQ [#permalink] New post 27 Aug 2007, 18:20
I vote for A
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Re: CR IQ [#permalink] New post 28 Aug 2007, 04:30
Very subtle question, but C seems clear.

Piter 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.

I underlined some of the qualifiers.

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

a. Every graduate of TopNotch High School with an IQ of 150 has been accepted to at least one Ivy-League school.
Nope. Only those WHO APPLY, see the stem for capitalised text.

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. This is out of scope and can not be implied. The stem is about those who already graduated, not current graduates

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.
The word "possible" qualifies this choice for a correct answer. Otherwise it would be wrong.

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.
"At least" is misleading. Stem says All Top notch grads are 120+ers. Also, most 120+ers and all 150+ers blah blah...

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. Nothing in the stem suggests that a graguate applies to Ive just because he/she has IQ150
Re: CR IQ   [#permalink] 28 Aug 2007, 04:30
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