Find all School-related info fast with the new School-Specific MBA Forum

It is currently 15 Sep 2014, 23:42

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

13 men and 7 boys can finish a job in 7 days, while 6 boys

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
User avatar
Joined: 14 Apr 2005
Posts: 422
Location: India, Chennai
Followers: 1

Kudos [?]: 3 [0], given: 0

GMAT Tests User
13 men and 7 boys can finish a job in 7 days, while 6 boys [#permalink] New post 05 Jan 2006, 03:23
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
13 men and 7 boys can finish a job in 7 days, while 6 boys and 13 women can finish the same job in 6 days. In how many days can 1 man, 1 boy and 1 woman working together finish the same job?

(a) 42 (b) 54 (c) 21 (d) 63

Please show working.

Thanks
Sreeni
Director
Director
avatar
Joined: 13 Nov 2003
Posts: 801
Location: BULGARIA
Followers: 1

Kudos [?]: 20 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Jan 2006, 03:39
13m+7b=7, 6b+13w=6 for 1 day first group will finish 1/7 and second 1/6 of the job. Then both groups together 13b+13m+13w will finish 1/7+1/6 or 13/42 of the job in one day or they will need 42/13 days. Since the question is about one b,m and w then multiply by 13 and get 42 days
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5097
Location: Singapore
Followers: 19

Kudos [?]: 143 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Jan 2006, 03:53
13 men + 7 boys = 7 days to finish a job --> 1/7 job in one day

13 women + 6 boys = 6 days to finish a job --> 1/6 job in one day

Then 13 men + 13 women + 13 boys = 1/7 + 1/6 job in a day

1 men + 1 women + 1 boy = 13/42 * 1/13 = 1/42 job in a day

So to finish the job, it will take 42 days (A)
Senior Manager
Senior Manager
avatar
Joined: 11 Nov 2005
Posts: 336
Location: London
Followers: 1

Kudos [?]: 8 [0], given: 0

GMAT Tests User
 [#permalink] New post 06 Jan 2006, 15:20
42 days


good question...
13/M + 7/B = 1/7
6/B + 13/W = 1/6

ADD UP BOTH

13/M +13/B +13/W = 1/7+1/6 =13/42

Divide both sides by 13,

1/M + 1/B + 1/W = 1/42

or 42 days for 1 M+1B+1W
Director
Director
User avatar
Joined: 04 Oct 2005
Posts: 587
Location: Chicago
Followers: 1

Kudos [?]: 5 [0], given: 0

GMAT Tests User
 [#permalink] New post 07 Jan 2006, 14:41
42 days

13M + 7B in 1 day do 1/7 work
6B + 13 W in 1 day do 1/6 work
Add
13M +13B + 13W in 1 day do 1/7+1/6 work= 13/42 work
=>they complete the work in 42/13 days.
so 1M+1B+1W would complete it in 42/13*13=42 days
Senior Manager
Senior Manager
User avatar
Joined: 14 Apr 2005
Posts: 422
Location: India, Chennai
Followers: 1

Kudos [?]: 3 [0], given: 0

GMAT Tests User
Re: PS - Work / Job [#permalink] New post 08 Jan 2006, 20:42
krisrini wrote:
13 men and 7 boys can finish a job in 7 days, while 6 boys and 13 women can finish the same job in 6 days. In how many days can 1 man, 1 boy and 1 woman working together finish the same job?

(a) 42 (b) 54 (c) 21 (d) 63

Please show working.

Thanks
Sreeni


All of you are correct the OA is 42.
Re: PS - Work / Job   [#permalink] 08 Jan 2006, 20:42
    Similar topics Author Replies Last post
Similar
Topics:
It takes 13 men and 7 children to complete a job in 7 days. whynot 3 27 Jul 2007, 06:55
13 men and 7 boys can finish a job in 7 days, while 6 boys nfa1rhp 4 22 Jul 2007, 12:08
In a group A, there are 7 boys and 3 girls, while in another briozeal 9 14 May 2006, 16:37
If 12 boys and 16 girls can do a work in 5 days and 13 boys gsr 8 04 Nov 2005, 10:13
If 20 men or 24 women or 40 boys can do a job in 12 days revital 9 01 Dec 2004, 10:50
Display posts from previous: Sort by

13 men and 7 boys can finish a job in 7 days, while 6 boys

  Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.