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

 It is currently 17 Nov 2018, 03:18

### 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

## Events & Promotions

###### Events & Promotions in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
• ### FREE Quant Workshop by e-GMAT!

November 18, 2018

November 18, 2018

07:00 AM PST

09:00 AM PST

Get personalized insights on how to achieve your Target Quant Score. November 18th, 7 AM PST
• ### How to QUICKLY Solve GMAT Questions - GMAT Club Chat

November 20, 2018

November 20, 2018

09:00 AM PST

10:00 AM PST

The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat.

# A company pays project contractors a rate of "a" dollars for the first

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

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 50621
A company pays project contractors a rate of "a" dollars for the first  [#permalink]

### Show Tags

22 Jul 2018, 22:53
00:00

Difficulty:

35% (medium)

Question Stats:

75% (01:26) correct 25% (02:17) wrong based on 16 sessions

### HideShow timer Statistics

A company pays project contractors a rate of "a" dollars for the first hour and "b" dollars for each additional hour after the first, where a > b.

In a given month, a contractor worked on two different projects that lasted 2 and 4 hours, respectively. The company has the option to pay for each project individually or for all the projects at the end of the month. Which arrangement would be cheaper for the company and how much would the company save?

A) Per month, with savings of \$(a + b)
B) Per month, with savings of \$(a - b)
C) The two options would cost an equal amount.
D) Per project, with savings of \$(a + b)
E) Per project, with savings of \$(a - b)

_________________
Math Expert
Joined: 02 Aug 2009
Posts: 7035
Re: A company pays project contractors a rate of "a" dollars for the first  [#permalink]

### Show Tags

23 Jul 2018, 01:35
Bunuel wrote:
A company pays project contractors a rate of "a" dollars for the first hour and "b" dollars for each additional hour after the first, where a > b.

In a given month, a contractor worked on two different projects that lasted 2 and 4 hours, respectively. The company has the option to pay for each project individually or for all the projects at the end of the month. Which arrangement would be cheaper for the company and how much would the company save?

A) Per month, with savings of \$(a + b)
B) Per month, with savings of \$(a - b)
C) The two options would cost an equal amount.
D) Per project, with savings of \$(a + b)
E) Per project, with savings of \$(a - b)

Clearly per month is better because you have to pay a once for each project, so 2a for two projects..
Whereas if both are paid together, we pay b instead of a..
So savings are a-b
B

Otherwise
Project wise..
2 hrs .....a+b
4 hrs ....a+3b
Total 2a+4b

Month wise
2+4=6.....a+5b
a>b...... so savings 2a+4b-(a+5b)=2a+4b-a-5b=a-b

B
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

GMAT online Tutor

Re: A company pays project contractors a rate of "a" dollars for the first &nbs [#permalink] 23 Jul 2018, 01:35
Display posts from previous: Sort by

# A company pays project contractors a rate of "a" dollars for the first

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

 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®.