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If A, then B. If B, then C. If C, then D. If all of the

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Manager
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Joined: 14 Jun 2009
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Kudos [?]: 32 [0], given: 9

If A, then B. If B, then C. If C, then D. If all of the [#permalink]

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New post 30 Jul 2009, 23:09
00:00
A
B
C
D
E

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:P7.
If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

Kudos [?]: 32 [0], given: 9

Manager
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Joined: 14 Nov 2008
Posts: 195

Kudos [?]: 123 [0], given: 3

Schools: Stanford...Wait, I will come!!!
Re: If a,b,c,d [#permalink]

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New post 31 Jul 2009, 00:05
arvs212 wrote:
:P7.
If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.


For detail, you can go through the LSAT books available at the forum.
But, in crisp, the solution says..
if A then B, A--> B AND !B=!A
So, if we carry on the chain, then A-->B-->C-->D
And the not chain would be like.. !D-->!C -->!B-->!A
So, C is the answer.

Kudos [?]: 123 [0], given: 3

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Joined: 26 Apr 2009
Posts: 433

Kudos [?]: 94 [0], given: 41

Location: Vagabond
Schools: BC
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WE 2: Banking
Re: If a,b,c,d [#permalink]

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New post 31 Jul 2009, 04:26
Can we expect these kind of questions in GMAT or this is more of a LSAT question?
_________________

If you have made mistakes, there is always another chance for you. You may have a fresh start any moment you choose, for this thing we call "failure" is not the falling down, but the staying down.

Kudos [?]: 94 [0], given: 41

Re: If a,b,c,d   [#permalink] 31 Jul 2009, 04:26
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