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

Redeem

last one.

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 422
Joined: Mon Aug 09, 2010 11:47 am
Thanked: 22 times
Followed by:1 members
GMAT Score:680

by beatthegmatinsept » Thu Sep 23, 2010 8:01 am
IMO A.
This is like problem # 190 or 191 in OG 12, where they ask you to find the shortest possible length traveling in going 3 blocks north and 2 blocks east. NNNEE and so on.
Being defeated is often only a temporary condition. Giving up is what makes it permanent.
Top
User avatar
Legendary Member
Posts: 866
Joined: Mon Aug 02, 2010 6:46 pm
Location: Gwalior, India
Thanked: 31 times

by goyalsau » Thu Sep 23, 2010 8:08 am
I am not done with OG 12 yet, so don't know much about that,
well you answer is correct but how to do it?
Top
Master | Next Rank: 500 Posts
Posts: 156
Joined: Sat Sep 04, 2010 2:27 am
Location: Leeds,UK
Thanked: 1 times

by lokesh r » Thu Sep 23, 2010 8:47 am
(5!)/(3! x 2!)=10

IMO A.
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 422
Joined: Mon Aug 09, 2010 11:47 am
Thanked: 22 times
Followed by:1 members
GMAT Score:680

by beatthegmatinsept » Thu Sep 23, 2010 9:06 am
lokesh r wrote:(5!)/(3! x 2!)=10

IMO A.
The above is a quick way to do it.. I solved by considering diff combinations:
RRRBB
RRBBR
RBBRR
BBRRR
RBRRB
RBRBR
BRBRR
BRRBR
BRRRB
BRRRB
Being defeated is often only a temporary condition. Giving up is what makes it permanent.
Top
Legendary Member
Posts: 1119
Joined: Fri May 07, 2010 8:50 am
Thanked: 29 times
Followed by:3 members

by diebeatsthegmat » Thu Sep 23, 2010 10:20 am
goyalsau wrote:HI! guys.
3 red +2 blue= 5
thus 5!/2!3!=10
Top
User avatar
Senior | Next Rank: 100 Posts
Posts: 48
Joined: Sun Jul 20, 2008 4:45 pm
Location: Tallahassee, FL
Thanked: 2 times

by tlt2372 » Thu Sep 23, 2010 6:36 pm
This is a combinatorics problem - MGmat goes over this in detail in the Word Translations Strategy Guide.

5!/3!2! = 10
Top
Post new topic Post Reply
• Page 1 of 1