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CR_conditional statement

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CR_conditional statement [#permalink] New post 22 Mar 2008, 12:33
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
I need ur ideas, folks on this question. I will post OA and OE later. Thanks.
Crack GMAT (diagnostic test)
Question # 20
I meet the principal and the vice-principal whenever I visit the school.
If this statement is true, which of the following must also be true?
1) If I am meeting the principal and the vice-principal, I am visiting the school.
2) If I am meeting the principal but not the vice-principal, I am not visiting the school.
3) If I am not visitng the school, I am not meeting the principal and the vice principal.

(A) I only

(B) II only

(3) III only

(D) I and II only

(E) II and III only
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Re: CR_conditional statement [#permalink] New post 22 Mar 2008, 14:44
Expert's post
B

1) If I am meeting the principal and the vice-principal, I am visiting the school.
Can be false: I meet the principal and the vice-principal whenever I visit the cafe. - does not contradict to the initial statement.
Therefore, If I meet the principal and the vice-principal, I may visit the school or the cafe (not the school)


2) If I am meeting the principal but not the vice-principal, I am not visiting the school.
Denial test: I am meeting the principal but not the vice-principal ---> I am visiting the school. --> I meet the principal and the vice-principal whenever I visit the school.
there is contradiction. Therefore, the statement must be true.


3) If I am not visitng the school, I am not meeting the principal and the vice principal.
The same reasoning as for 1).
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Re: CR_conditional statement [#permalink] New post 22 Mar 2008, 17:06
UMB wrote:
I need ur ideas, folks on this question. I will post OA and OE later. Thanks.
Crack GMAT (diagnostic test)

Question # 20: I meet the principal and the vice-principal whenever I visit the school.

If this statement is true, which of the following must also be true?

1) If I am meeting the principal and the vice-principal, I am visiting the school.
2) If I am meeting the principal but not the vice-principal, I am not visiting the school.
3) If I am not visitng the school, I am not meeting the principal and the vice principal.

(A) I only
(B) II only
(C) III only
(D) I and II only
(E) II and III only


1) If I am meeting the principal and the vice-principal, I am visiting the school.
I could be meeting them out of the school. so not true.

2) If I am meeting the principal but not the vice-principal, I am not visiting the school.
If I visit the school, I meet both. If I am not meeting both, then I am not visiting the school. I am meeting the principal somewhere else out of the school. True.

3) If I am not visitng the school, I am not meeting the principal and the vice principal.
I could be meeting both somewhere else other than school. so not true.

Only B.
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Re: CR_conditional statement [#permalink] New post 22 Mar 2008, 19:55
UMB wrote:
I need ur ideas, folks on this question. I will post OA and OE later. Thanks.
Crack GMAT (diagnostic test)
Question # 20
I meet the principal and the vice-principal whenever I visit the school.
If this statement is true, which of the following must also be true?
1) If I am meeting the principal and the vice-principal, I am visiting the school.
2) If I am meeting the principal but not the vice-principal, I am not visiting the school.
3) If I am not visitng the school, I am not meeting the principal and the vice principal.

(A) I only

(B) II only

(3) III only

(D) I and II only

(E) II and III only



B also

if A then B and C

Must be true: If Not B or not C, then not A
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Re: CR_conditional statement [#permalink] New post 23 Mar 2008, 09:21
Thank you guys for great explanations.
Here are OE and OA. I didn't like below explanation, although it leads to urs.

Explanation (Crack GMAT)
This is best attempted through the process of elimination.
All that the given statement contends is that if I am visiting the school, I am meeting the principal AND the vice-principal.
In light of this, statements I and III are not valid.

Hence (B) is the correct answer.
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Re: CR_conditional statement [#permalink] New post 25 Mar 2008, 01:55
b IS THE CORRECT ONE!
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Re: CR_conditional statement [#permalink] New post 25 Mar 2008, 03:12
yea B I agree.
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Re: CR_conditional statement   [#permalink] 25 Mar 2008, 03:12
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