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

 It is currently 19 Sep 2018, 17:44

### 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

# Louis invites 45 friends to his birthday party. of his friends atten

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 49251
Louis invites 45 friends to his birthday party. of his friends atten  [#permalink]

### Show Tags

28 Sep 2017, 01:32
2
00:00

Difficulty:

25% (medium)

Question Stats:

91% (00:31) correct 9% (00:25) wrong based on 35 sessions

### HideShow timer Statistics

Louis invites 45 friends to his birthday party. 2/3 of his friends attend, but 1/3 of them leave the party early. If everyone else stays until the end, how many of Louis"s friends are still at the party when it ends?

A. 30
B. 21
C. 20
D. 11
E. 10

_________________
Senior Manager
Joined: 02 Jul 2017
Posts: 294
Concentration: Entrepreneurship, Technology
GMAT 1: 730 Q50 V38
Re: Louis invites 45 friends to his birthday party. of his friends atten  [#permalink]

### Show Tags

28 Sep 2017, 01:43
Louis invites 45 friends to his birthday party. 2/3 of his friends attend, but 1/3 of them leave the party early. If everyone else stays until the end, how many of Louis"s friends are still at the party when it ends?

No of friends attend party = 2/3 * 45 = 30
No.of friends who left party = 1/3 * 30 = 10

No of friends stayed till end = 30-10 = 20

Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2835
Re: Louis invites 45 friends to his birthday party. of his friends atten  [#permalink]

### Show Tags

03 Oct 2017, 10:05
Bunuel wrote:
Louis invites 45 friends to his birthday party. 2/3 of his friends attend, but 1/3 of them leave the party early. If everyone else stays until the end, how many of Louis"s friends are still at the party when it ends?

A. 30
B. 21
C. 20
D. 11
E. 10

We see that 2/3 x 45 = 30 friends attend and 1/3 x 30 = 10 friends leave early. Thus, 20 friends stay until the end of the party.

_________________

Jeffery Miller

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

BSchool Forum Moderator
Joined: 26 Feb 2016
Posts: 3131
Location: India
GPA: 3.12
Re: Louis invites 45 friends to his birthday party. of his friends atten  [#permalink]

### Show Tags

03 Oct 2017, 12:05
Louis invites 45 friends to his birthday party. 2/3 of his friends attend, but 1/3 of them leave the party early. If everyone else stays until the end, how many of Louis"s friends are still at the party when it ends?

If x=45,
we have been asked to find
$$\frac{2x}{3} - \frac{1}{3}(\frac{2x}{3}) => \frac{2x}{3} - \frac{2x}{9} = \frac{4x}{9} = \frac{4*45}{9} = 20$$

Therefore, 20 of Louis's friends still till the end of his birthday party (Option C)
_________________

You've got what it takes, but it will take everything you've got

Re: Louis invites 45 friends to his birthday party. of his friends atten &nbs [#permalink] 03 Oct 2017, 12:05
Display posts from previous: Sort by

# Events & Promotions

 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®.