It is currently 20 Oct 2017, 20:57
Search
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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.

Go to My Workbook Learn more
Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar
CLICK HERE TO HIDE/SHOW EVENTS

In a city where all streets run east-to-west, all avenues run north-to

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Manager
Manager
User avatar
Status: Gmat Prep
Joined: 22 Jul 2011
Posts: 74

Kudos [?]: 63 [0], given: 39

GMAT ToolKit User
In a city where all streets run east-to-west, all avenues run north-to [#permalink]

Show Tags

New post 17 Mar 2015, 11:26
12
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

42% (02:02) correct 58% (02:14) wrong based on 85 sessions

HideShow timer Statistics

In a city where all streets run east-to-west, all avenues run north-to-south, and all intersections are right angles as shown below, Jessica needs to walk from the corner of 6th Street and 3rd Avenue to the corner of 1st Street and 1st Avenue. If Jessica will randomly choose from any route that allows her to walk the fewest number of blocks, what is the probability that she walks exactly two blocks on 1st Avenue?

a) 1/21
b) 1/7
c) 4/21
d) 10/21
e) 12/21
[Reveal] Spoiler: OA

Attachments

Street_Map.png
Street_Map.png [ 5.64 KiB | Viewed 2501 times ]

Kudos [?]: 63 [0], given: 39

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41892

Kudos [?]: 129048 [0], given: 12187

Premium Member CAT Tests
Top Member of the Month
Re: In a city where all streets run east-to-west, all avenues run north-to [#permalink]

Show Tags

New post 17 Mar 2015, 11:33
Expert's post
1
This post was
BOOKMARKED
ynaikavde wrote:
In a city where all streets run east-to-west, all avenues run north-to-south, and all intersections are right angles as shown below, Jessica needs to walk from the corner of 6th Street and 3rd Avenue to the corner of 1st Street and 1st Avenue. If Jessica will randomly choose from any route that allows her to walk the fewest number of blocks, what is the probability that she walks exactly two blocks on 1st Avenue?

a) 1/21
b) 1/7
c) 4/21
d) 10/21
e) 12/21



Similar questions to practice:
in-a-city-where-all-streets-run-east-to-west-all-avenues-run-north-to-186781.html
every-morning-casey-walks-from-her-house-to-the-bus-stop-104236.html
josh-has-to-run-an-electrical-wire-from-point-a-to-point-b-99962.html
as-per-the-given-figure-there-are-many-horizontal-and-134453.html
pat-will-walk-from-intersection-a-to-intersection-b-along-a-68374.html
as-per-the-given-figure-there-are-many-horizontal-and-134453.html
alicia-lives-in-a-town-whose-streets-are-on-a-grid-system-126920.html
in-city-a-the-streets-are-aligned-in-a-grid-where-the-east-136949.html
the-diagram-above-shows-the-various-paths-along-which-a-mous-144271.html
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 129048 [0], given: 12187

Manager
Manager
avatar
Joined: 01 Apr 2015
Posts: 66

Kudos [?]: 12 [0], given: 139

Re: In a city where all streets run east-to-west, all avenues run north-to [#permalink]

Show Tags

New post 10 Apr 2015, 08:18
Bunuel, could you please explain how do we deal with the restriction ? (Only two blocks on 1st avenue).

Kudos [?]: 12 [0], given: 139

7 KUDOS received
Director
Director
User avatar
Joined: 07 Aug 2011
Posts: 583

Kudos [?]: 538 [7], given: 75

Concentration: International Business, Technology
GMAT 1: 630 Q49 V27
GMAT ToolKit User
In a city where all streets run east-to-west, all avenues run north-to [#permalink]

Show Tags

New post 10 Apr 2015, 10:09
7
This post received
KUDOS
2
This post was
BOOKMARKED
ynaikavde wrote:
In a city where all streets run east-to-west, all avenues run north-to-south, and all intersections are right angles as shown below, Jessica needs to walk from the corner of 6th Street and 3rd Avenue to the corner of 1st Street and 1st Avenue. If Jessica will randomly choose from any route that allows her to walk the fewest number of blocks, what is the probability that she walks exactly two blocks on 1st Avenue?

a) 1/21
b) 1/7
c) 4/21
d) 10/21
e) 12/21



She choose a route which allows her to walk fewest number of blocks
there are 2 blocks she will cross towards east moves represented by E,E and there will be 5 blocks she will cross towards south represented by S,S,S,S,S

total number of ways \(\frac{7!}{5!2!}\)

there are 4 ways she can cross 2 blocks on av.1 as shown in attached image.


4/21 is Answer .

in order to reach from black dot to blue dot she has to make 1 E and 3 S moves .. total 4!/3! = 4Ways . now from Blue dot to Maroon dot there is only 1 way . so there are only 4 ways .


A
Attachments

gclub.jpg
gclub.jpg [ 44.12 KiB | Viewed 2263 times ]


_________________

Thanks,
Lucky

_______________________________________________________
Kindly press the Image to appreciate my post !! :-)

Kudos [?]: 538 [7], given: 75

Manager
Manager
avatar
Joined: 01 Apr 2015
Posts: 66

Kudos [?]: 12 [0], given: 139

Re: In a city where all streets run east-to-west, all avenues run north-to [#permalink]

Show Tags

New post 10 Apr 2015, 11:40
Thank you Lucky2783 for the detailed explanation.

Kudos [?]: 12 [0], given: 139

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 16637

Kudos [?]: 273 [0], given: 0

Premium Member
Re: In a city where all streets run east-to-west, all avenues run north-to [#permalink]

Show Tags

New post 07 Oct 2017, 06:21
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Kudos [?]: 273 [0], given: 0

Re: In a city where all streets run east-to-west, all avenues run north-to   [#permalink] 07 Oct 2017, 06:21
Print view
First unread post
Display posts from previous: Sort by

In a city where all streets run east-to-west, all avenues run north-to

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

Moderators: Engr2012, mikemcgarry, Abhishek009, VeritasPrepKarishma, Skywalker18, msk0657, abhimahna, Bunuel, Vyshak

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions