GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 14 Dec 2019, 11:48

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.

Close

Request Expert Reply

Confirm Cancel

3 men and 4 boys can earn $756 in 7 days. 11 men and 13 boys can earn

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
General GMAT Forum Moderator
User avatar
V
Joined: 15 Jan 2018
Posts: 677
Concentration: General Management, Finance
GMAT 1: 720 Q50 V37
Premium Member Reviews Badge
3 men and 4 boys can earn $756 in 7 days. 11 men and 13 boys can earn  [#permalink]

Show Tags

New post 04 Apr 2019, 16:49
2
1
3
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

64% (02:50) correct 36% (03:33) wrong based on 36 sessions

HideShow timer Statistics

3 men and 4 boys can earn $756 in 7 days. 11 men and 13 boys can earn $3008 in 8 days. In what time will 7 men with 9 boys earn $2480?

A. 8 days
B. 10 days
C. 15 days
D. 20 days
E. 12 days
Manager
Manager
User avatar
G
Joined: 21 Feb 2019
Posts: 125
Location: Italy
Premium Member
Re: 3 men and 4 boys can earn $756 in 7 days. 11 men and 13 boys can earn  [#permalink]

Show Tags

New post 04 Apr 2019, 18:14
2
Solution attached. This was tough! Nice question.

Posted from my mobile device
Attachments

20190405.pdf [163.64 KiB]
Downloaded 60 times

To download please login or register as a user

Manager
Manager
avatar
S
Joined: 09 Nov 2015
Posts: 154
Re: 3 men and 4 boys can earn $756 in 7 days. 11 men and 13 boys can earn  [#permalink]

Show Tags

New post 05 Apr 2019, 01:03
1
In 7 days, 3 men+4 boys (Combo 1) can earn $756
In 1 day, 3M+4B (C1) can earn $108 (756/7)

In 8 days, 11M+13B (Combo 2), can earn$3008
In 1 day, 11M+13B, can earn $376 (3008/8)

By increasing C1 eleven-fold and C2 three-fold, we see that in 1 day:
33M+44B (C3) can earn $1188 (108*11) and
33M+39B (C4) can earn $1128 (376*3)
The presence of 5 more boys in C3 (the number of men being the same in both combos) yields an additional income of $60 (1188-1128) in 1 day from which we can conclude that 1 boy can earn $12 in a day.
From the fact that 3M+4B can earn $108 in 1 day, we can calculate that 1M earns $20 in 1 day.

Let's say X is the number of days it takes 7M & 9B to earn $2480.
Then, $20*7X+ $12*9=$2480 -----> 248X=2480 ----> X=10 days. Ans:B
GMAT Club Bot
Re: 3 men and 4 boys can earn $756 in 7 days. 11 men and 13 boys can earn   [#permalink] 05 Apr 2019, 01:03
Display posts from previous: Sort by

3 men and 4 boys can earn $756 in 7 days. 11 men and 13 boys can earn

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





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne