It is currently 24 Jun 2017, 12:19

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# M02 Q#7

Author Message
Intern
Joined: 18 Dec 2008
Posts: 1

### Show Tags

24 Aug 2009, 23:48
Andy, George and Sally are a team of consultants working on Project Alpha. They have an eight hour deadline to complete the project. The team members work at constant rates throughout the eight hour period. If the team of three has to begin work now and no one else can work on this project, will Project Alpha be completed by the deadline?

1. Sally can finish the project alone in $$4k+7$$ hours, where $$k$$ is a positive integer with a minimum value of 1 and a maximum value of 5.
2. Working alone, George will take $$2k+1$$ hours and Andy will take $$3+2k$$ hours, where $$k$$ is a positive integer with a minimum value of 1 and a maximum value of 5

a. Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
b. Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
c. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
d. EACH statement ALONE is sufficient
e. Statements (1) and (2) TOGETHER are NOT sufficient

Statement (1) by itself is not sufficient. From S1, we know Sally can finish the project in $$4k+7$$ hours, but we know nothing about George's or Andy's time. Check if Sally can finish the work by herself. If $$k$$ is the smallest value (1), Sally will need 11 hours to finish the project. We need to know George's and/or Andy's rate.

Statement (2) by itself is sufficient. From S2, we know that George will take $$2k+1$$ hours and Andy will take $$2k+3$$ hours.

Check whether George and Andy can finish the project by themselves. Check to see if the maximum value of $$k$$ is sufficient for these two together to finish the project. If the maximum value of $$k = 5$$ , then George needs 11 hours and Andy needs 13 hours to finish the project alone.

Working together for one hour, George and Andy will finish:
1/11 + 1/13 > 1/8

of the work. Thus, working together, George and Andy finish a greater portion of work per hour than the required . As a result, they will easily finish the project by themselves. It is not necessary to know Sally's time to answer the question.

My question:
How can you assume the maximum value for K when the question clearly specifies a range for K and doesnt talk about any condition to choose the maximum value. The answer would be E, if one were to not assume the max value for K.
Senior Manager
Joined: 18 Aug 2009
Posts: 423
Schools: UT at Austin, Indiana State University, UC at Berkeley
WE 1: 5.5
WE 2: 5.5
WE 3: 6.0

### Show Tags

25 Aug 2009, 04:49
Are u able to clarify the problem,
I think u missed some numbers in it
_________________

Never give up,,,

Manager
Joined: 14 Aug 2009
Posts: 123

### Show Tags

25 Aug 2009, 09:03
satish1981 wrote:
Andy, George and Sally are a team of consultants working on Project Alpha. They have an eight hour deadline to complete the project. The team members work at constant rates throughout the eight hour period. If the team of three has to begin work now and no one else can work on this project, will Project Alpha be completed by the deadline?

Sally can finish the project alone in hours, where is a positive integer with a minimum value of 1 and a maximum value of 5.
Working alone, George will take hours and Andy will take hours, where is a positive integer with a minimum value of 1 and a maximum value of 5

a. Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
b. Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
c. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
d. EACH statement ALONE is sufficient
e. Statements (1) and (2) TOGETHER are NOT sufficient

Statement (1) by itself is not sufficient. From S1, we know Sally can finish the project in hours, but we know nothing about George's or Andy's time. Check if Sally can finish the work by herself. If is the smallest value (1), Sally will need 11 hours to finish the project. We need to know George's and/or Andy's rate.

Statement (2) by itself is sufficient. From S2, we know that George will take hours and Andy will take hours.

Check whether George and Andy can finish the project by themselves. Check to see if the maximum value of is sufficient for these two together to finish the project. If the maximum value of k=5 , then George needs 11 hours and Andy needs 13 hours to finish the project alone.

Working together for one hour, George and Andy will finish:
1/11 + 1/13 > 1/8

of the work. Thus, working together, George and Andy finish a greater portion of work per hour than the required . As a result, they will easily finish the project by themselves. It is not necessary to know Sally's time to answer the question.

My question:
How can you assume the maximum value for K when the question clearly specifies a range for K and doesnt talk about any condition to choose the maximum value. The answer would be E, if one were to not assume the max value for K.

I had problem to understand this question! where did you get 11 and 13 thing?
_________________

Kudos me if my reply helps!

Manager
Joined: 10 Jul 2009
Posts: 164

### Show Tags

25 Aug 2009, 09:50
Please update the question. I guess few variables are missed in the question.
CIO
Joined: 02 Oct 2007
Posts: 1218

### Show Tags

25 Aug 2009, 10:33
I've updated the question in the first post.
_________________

Welcome to GMAT Club!

Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

GMAT Club Premium Membership - big benefits and savings

Re: M02 Q#7   [#permalink] 25 Aug 2009, 10:33
Similar topics Replies Last post
Similar
Topics:
6 m02 #20 26 06 Dec 2013, 07:49
37 M02 #19 26 14 Nov 2011, 22:31
15 m02 #21 28 16 May 2014, 07:52
40 m02#24 14 17 Jul 2013, 05:55
22 m02#8 16 16 Dec 2013, 20:48
Display posts from previous: Sort by

# M02 Q#7

Moderator: Bunuel

 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®.