BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

Mary has qualified to become a police officer.

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 28
Joined: Thu Jul 28, 2011 11:53 am
by amsm25 » Fri Apr 27, 2012 3:20 am
Mary has qualified to become a police officer. Has Albert qualified to become a police officer?
1)If Albert qualifies to become a police officer, then Mary will qualify to become a police officer.
2)If Albert does not qualify to become a police officer, then Mary will not qualify to become a police officer.

AO- B. Need an explanation pls....
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 134
Joined: Fri Apr 06, 2012 3:11 amFollowed by: 5 members
Thanked: 35 times

by Shalabh's Quants » Fri Apr 27, 2012 5:33 am
amsm25 wrote:Mary has qualified to become a police officer. Has Albert qualified to become a police officer?
1)If Albert qualifies to become a police officer, then Mary will qualify to become a police officer.
2)If Albert does not qualify to become a police officer, then Mary will not qualify to become a police officer.

AO- B. Need an explanation pls....
These are implication/Conditional statement in the form of 'If..Then..'

Statement 1...

It is basically 'If P then Q' type implication. 'If P then Q' to be True, it is not necessary that P (Albert qualifies to become a police officer) is true when Q (Mary qualifies to become a police officer) being true.

We know that Q (Mary qualifies to become a police officer) is true, but P (Albert qualifies to become a police officer) can be true/false. Not sufficient.

By analysing non-mathematically, Mary's police officer qualification is not solely defendant on Albert's qualification. Since we know that Mary is already qualified to be police officer, it may occur despite Albert not qualified. hence Albert may/not be qualified. Insuff.

Statement 2...

It is 'If P not then Q not' kind of statement. By similar argument, we can infer that Mary's police officer qualification is solely defendant on Albert's qualification. Since we know that Mary is already qualified to be police officer, hence Albert must be qualified. Suff. Ans B.
Shalabh Jain,
e-GMAT Instructor
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Fri Apr 27, 2012 6:19 am
I should point out that the GMAT seldom tests formal logic (deductive) logic. When it does, the concepts tested are very straightforward.

This question requires knowledge of something called the contrapositive, which says:
If we have a statement that says "If A then B," then we can also conclude that it must be the case that "If not B then not A"
This brand of formal logic is out of scope for the GMAT. So, for those students out there who became deeply concerned when they read the question, don't worry. This concept is not required knowledge.

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 626
Joined: Fri Dec 23, 2011 2:50 amFollowed by: 10 members
Location: Ahmedabad
Thanked: 31 times

by ronnie1985 » Fri Apr 27, 2012 7:55 am
Thanks Brent...

Deductions are difficult to comprehend...
Follow your passion, Success as perceived by others shall follow you
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 29
Joined: Thu Dec 25, 2008 2:55 pm
Thanked: 2 times

by minhchau1986 » Fri Apr 27, 2012 8:05 am
The answer is B

Using the logical constraints,
If A, then B
So .....if not B, then A

Apply to the problem, we have
Answer 2, if no A, then no M
It means If M is true, then A is true
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 59
Joined: Sun Mar 11, 2012 8:57 pmFollowed by: 1 member
Location: India
Thanked: 16 times

by shantanu86 » Fri Apr 27, 2012 6:07 pm
amsm25 wrote:Mary has qualified to become a police officer. Has Albert qualified to become a police officer?
1)If Albert qualifies to become a police officer, then Mary will qualify to become a police officer.
2)If Albert does not qualify to become a police officer, then Mary will not qualify to become a police officer.

AO- B. Need an explanation pls....
Its easy..
Lets analyze both-

1)If Albert qualifies to become a police officer, then Mary will qualify to become a police officer.
=> Albert is of lesser caliber than Marry that's why his qualification automatically ensures Mary.

2)If Albert does not qualify to become a police officer, then Mary will not qualify to become a police officer.
=> This correctly indicated that Albert is of higher caliber as his disqualification implies Mary's.

Thus, from 2 if Mary qualified Albert has qualified too.
If you feel like it, hit thanks :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 134
Joined: Fri Apr 06, 2012 3:11 amFollowed by: 5 members
Thanked: 35 times

by Shalabh's Quants » Sat Apr 28, 2012 4:39 am
shantanu86 wrote:
amsm25 wrote:Mary has qualified to become a police officer. Has Albert qualified to become a police officer?
1)If Albert qualifies to become a police officer, then Mary will qualify to become a police officer.
2)If Albert does not qualify to become a police officer, then Mary will not qualify to become a police officer.

AO- B. Need an explanation pls....
Its easy..
Lets analyze both-

1)If Albert qualifies to become a police officer, then Mary will qualify to become a police officer.
=> Albert is of lesser caliber than Marry that's why his qualification automatically ensures Mary.

2)If Albert does not qualify to become a police officer, then Mary will not qualify to become a police officer.
=> This correctly indicated that Albert is of higher caliber as his disqualification implies Mary's.

Thus, from 2 if Mary qualified Albert has qualified too.
No, I am afraid that's not the case Shantanu. The statements need not be analysed qualitatively. As Brent pointed out that it is Mathematical/Deductive reasoning question. Discard factual facts to infer.

Even on funny side the statement could be...
'If Messy scores goals then Obama will be re-elected.' There is no co-relation between them.

Well as Brent has pointed out 'this question is out of scope of GMAT'.
Shalabh Jain,
e-GMAT Instructor
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 59
Joined: Sun Mar 11, 2012 8:57 pmFollowed by: 1 member
Location: India
Thanked: 16 times

by shantanu86 » Sun Apr 29, 2012 6:11 am
Hi Shalabh,

I'm not too sure if the question is within the scope of GMAT but then I see no reason why it shouldn't be analyzed :)

In GMAT, or any other exam for that matter, one must restrict himself to the purview of information divulged by question.

So, if in GMAT it says-
'If Messy scores goals then Obama will be re-elected.' There is no co-relation between them.
We are ought to believe it irrespective of its factual correlation :)

Thus (for the purposes of GMAT) it concludes

If Obama not reelected => Messy didn't score goals

Regards,
Shantanu
If you feel like it, hit thanks :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1