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

 It is currently 22 Feb 2019, 13:00

### 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 February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
• ### Free GMAT RC Webinar

February 23, 2019

February 23, 2019

07:00 AM PST

09:00 AM PST

Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT
• ### FREE Quant Workshop by e-GMAT!

February 24, 2019

February 24, 2019

07:00 AM PST

09:00 AM PST

Get personalized insights on how to achieve your Target Quant Score.

# A local group working to get signatures for a petition to pass a new

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 53066
A local group working to get signatures for a petition to pass a new  [#permalink]

### Show Tags

06 Apr 2018, 04:05
00:00

Difficulty:

25% (medium)

Question Stats:

81% (01:39) correct 19% (02:15) wrong based on 70 sessions

### HideShow timer Statistics

A local group working to get signatures for a petition to pass a new ordinance lists all signers in their database as either “residents” or “non-residents”. If the ratio of residents to nonresidents in the database is 3 : 5, how many signers are currently listed as non-residents in the database?

(1) If the next six signers are all residents, the ratio of residents to nonresidents in the database will be 1 : 1

(2) If three signers had been incorrectly assigned and were nonresidents rather than residents, the ratio of residents to nonresidents in the database would be 1: 3 once this was corrected.

_________________
DS Forum Moderator
Joined: 21 Aug 2013
Posts: 1431
Location: India
Re: A local group working to get signatures for a petition to pass a new  [#permalink]

### Show Tags

06 Apr 2018, 23:57
Bunuel wrote:
A local group working to get signatures for a petition to pass a new ordinance lists all signers in their database as either “residents” or “non-residents”. If the ratio of residents to nonresidents in the database is 3 : 5, how many signers are currently listed as non-residents in the database?

(1) If the next six signers are all residents, the ratio of residents to nonresidents in the database will be 1 : 1

(2) If three signers had been incorrectly assigned and were nonresidents rather than residents, the ratio of residents to nonresidents in the database would be 1: 3 once this was corrected.

Let residents = 3x, non-residents = 5x. We need to find 5x, or we need to find x.

(1) If next 6 are all residents, new number of residents = 3x+6 and number of non-residents = 5x. Their ratio is 1:1 which means 3x + 6 = 5x, x=3. Sufficient.

(2) Here new number of residents = 3x-3 ,and new number of non-residents = 5x+3. So new ratio = (3x-3)/(5x+3) = 1/3 (given)
Solving this, we get x=3. Sufficient.

Intern
Joined: 29 Nov 2016
Posts: 35
GMAT 1: 650 Q47 V33
Re: A local group working to get signatures for a petition to pass a new  [#permalink]

### Show Tags

10 Apr 2018, 00:22
From the question stem: R/NR = 3x/5x(Ratio of residents and non-residents).
i) (3x+6)/5x = 1
Hence, we can easily calculate x and get total 5x(all non-residents signatories count).
ii) (3x-3)/(5x-3) = 1
Again we can easily calculate x and get total 5x(all non-residents signatories count).

_________________

Good things are going to happen. Keep fighting for what you want. Don't worry and have faith that it'll all work out!

Re: A local group working to get signatures for a petition to pass a new   [#permalink] 10 Apr 2018, 00:22
Display posts from previous: Sort by