It is currently 20 Feb 2018, 01:49

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

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

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Senior Manager
Senior Manager
avatar
Joined: 25 Jun 2009
Posts: 294
If A, then B. If B, then C. If C, then D. If all of the [#permalink]

Show Tags

New post 18 Jul 2009, 03:01
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

7. 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.

OA is C but I am not sure why. Can anyone explain ?

Thanks,
1 KUDOS received
Director
Director
avatar
Joined: 05 Jun 2009
Posts: 805
WE 1: 7years (Financial Services - Consultant, BA)
Re: 1000 CR [#permalink]

Show Tags

New post 18 Jul 2009, 08:38
1
This post received
KUDOS
if X, then y

==> If not Y, then not X.
_________________

Consider kudos for the good post ... :beer
My debrief : http://gmatclub.com/forum/journey-670-to-720-q50-v36-long-85083.html

Manager
Manager
User avatar
Joined: 30 Dec 2008
Posts: 55
Location: Washington DC
Schools: Kellogs, Darden, Stern, Tepper
Re: 1000 CR [#permalink]

Show Tags

New post 18 Jul 2009, 12:12
i agree with the reasoning given by sudeep,

if x then y, if not y then not x,

for ex: if 70, means you crossed 60, if not 60, then you also didn't cross 70....i hope this relates to what sudeep is trying to say...?
_________________

Give and Take Kudos! if you are benefitted from a post!

Senior Manager
Senior Manager
avatar
Joined: 25 Jun 2009
Posts: 294
Re: 1000 CR [#permalink]

Show Tags

New post 19 Jul 2009, 01:27
mokri wrote:
i agree with the reasoning given by sudeep,

if x then y, if not y then not x,

for ex: if 70, means you crossed 60, if not 60, then you also didn't cross 70....i hope this relates to what sudeep is trying to say...?



Thanks Guys .. !
1 KUDOS received
Director
Director
avatar
Joined: 05 Jun 2009
Posts: 805
WE 1: 7years (Financial Services - Consultant, BA)
Re: 1000 CR [#permalink]

Show Tags

New post 19 Jul 2009, 11:31
1
This post received
KUDOS
mokri wrote:
i agree with the reasoning given by sudeep,

if x then y, if not y then not x,

for ex: if 70, means you crossed 60, if not 60, then you also didn't cross 70....i hope this relates to what sudeep is trying to say...?


if 70, means you crossed 60, if not 60, then you also didn't cross 70
if 70, means you crossed 60, if not crossed 60, then it's not 70.

But in general it is considered in terms of events.

If x event happen, then Y happens.

So if there is no event Y, then it is clearly understood that X event didn't happen.
This is because, Y is like a child event of X, and Y will always be there with X.

But ==> If Y happened, it doesn't imply that X has happened. Because it is nowhere mentioned that Y happens only when X happens.
_________________

Consider kudos for the good post ... :beer
My debrief : http://gmatclub.com/forum/journey-670-to-720-q50-v36-long-85083.html


Last edited by sudeep on 11 Aug 2009, 10:22, edited 1 time in total.
Senior Manager
Senior Manager
avatar
Joined: 25 Jun 2009
Posts: 294
Re: 1000 CR [#permalink]

Show Tags

New post 19 Jul 2009, 20:54
sudeep wrote:
mokri wrote:
i agree with the reasoning given by sudeep,

if x then y, if not y then not x,

for ex: if 70, means you crossed 60, if not 60, then you also didn't cross 70....i hope this relates to what sudeep is trying to say...?


if 70, means you crossed 60, if not 60, then you also didn't cross 70
if 70, means you crossed 60, if not crossed 60, then it's not 70.

But in general it is considered in terms of events.

If x event happen, then Y happens.

So if there is no event Y, then it is clearly understood that X event didn't happen.
This is because, Y is like a child event of X, and Y will always be there with X.

But ==> If Y happened, it doesn't imply that X has happened. Because it is nowhere mentioned that Y happens only when X happens.



Thanks alot Sudeep , I understood the concept.. ! :)
Manager
Manager
User avatar
Joined: 27 Jun 2008
Posts: 155
Re: 1000 CR [#permalink]

Show Tags

New post 21 Jul 2009, 01:49
Well explained sudeep +1
Re: 1000 CR   [#permalink] 21 Jul 2009, 01:49
Display posts from previous: Sort by

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

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: GMATNinjaTwo, GMATNinja



GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.