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If A then D

Expert replies
by neeti2711 » Sun Dec 09, 2012 9:36 am
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
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Source: — Critical Reasoning |

by himu » Sun Dec 09, 2012 10:38 pm
NOt a GMAT Q !

I'll pick : (B) If not B, then not C

OA pls?
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by The Iceman » Sun Dec 09, 2012 10:50 pm
neeti2711 wrote: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
Option C is correct here.

Basically the link in this problem establishes that If A, then D. So, another logical conclusion fom this could be if not D, then not A.

Note:As himu pointed out, this question itself will hardly appear on the GMAT. However, you should understand the basic logic here because line of reasoning of arguments can certainly follow this logic.
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