Last visit was: 12 Jul 2024, 15:49 It is currently 12 Jul 2024, 15:49
Toolkit
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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

# A certain town’s economic development council has 21 members. If the n

SORT BY:
Tags:
Show Tags
Hide Tags
GRE Forum Moderator
Joined: 02 Nov 2016
Posts: 14043
Own Kudos [?]: 36328 [2]
Given Kudos: 5828
GPA: 3.62
Tutor
Joined: 05 Apr 2011
Status:Tutor - BrushMyQuant
Posts: 1796
Own Kudos [?]: 2137 [1]
Given Kudos: 100
Location: India
Concentration: Finance, Marketing
Schools: XLRI (A)
GMAT 1: 700 Q51 V31
GPA: 3
WE:Information Technology (Computer Software)
Board of Directors
Joined: 11 Jun 2011
Status:QA & VA Forum Moderator
Posts: 6049
Own Kudos [?]: 4763 [0]
Given Kudos: 463
Location: India
GPA: 3.5
Intern
Joined: 24 May 2016
Posts: 13
Own Kudos [?]: 14 [1]
Given Kudos: 163
Location: Germany
A certain town’s economic development council has 21 members. If the n [#permalink]
1
Kudos
You have 21 members and you are given from the prompt the following equation:
f=3m-3 where f stands for the # of females and m for the # of males and m+f=21.
That's a 2V2E you can solve, two variables and two equations so you can do algebra, but here is a test the answer approach.
Now as the answer choices provide only values it is a good opportunity to test the answers, as you are looking for one value.
Start with B or D to see where you have to move.
B) 6 If there are 6 males you get f=(3*6) -3 --> f=15
Now sum the values to see if you get the desired value 15+6=21.
Thats a match and you don't have to test the other answers anymore.
Target Test Prep Representative
Joined: 04 Mar 2011
Affiliations: Target Test Prep
Posts: 3037
Own Kudos [?]: 6556 [0]
Given Kudos: 1646
Re: A certain town’s economic development council has 21 members. If the n [#permalink]
A certain town’s economic development council has 21 members. If the number of females on the council is 3 less than 3 times the number of males on the council, then the town’s economic development council has how many male members?

(A) 5
(B) 6
(C) 7
(D) 9
(E) 15

We can let the number of females on the council = f and the number of males on the council = m.

Since the number of females on the council is 3 less than 3 times the number of males on the council:

f = 3m - 3

Since the total number of people on the council is 21:

f + m = 21

Thus:

3m - 3 + m = 21

4m = 24

m = 6

GMAT Club Legend
Joined: 19 Dec 2014
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Posts: 21835
Own Kudos [?]: 11773 [0]
Given Kudos: 450
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Re: A certain town’s economic development council has 21 members. If the n [#permalink]
Hi All,

We're told that a certain town’s economic development council has 21 members and that the number of females on the council is 3 LESS than 3 TIMES the number of males on the council. We're asked for the number of male members on the council. This question can be solved in a couple of different ways, including by TESTing THE ANSWERS.

IF.... there are 6 male members...
the number of female members is (3)(6) - 3 = 18 - 3 = 15
6 + 15 = 21 total members

This is an exact match for what we were told, so this MUST be the answer.

GMAT assassins aren't born, they're made,
Rich
GMAT Club Legend
Joined: 12 Sep 2015
Posts: 6805
Own Kudos [?]: 30788 [1]
Given Kudos: 799
Re: A certain town’s economic development council has 21 members. If the n [#permalink]
1
Kudos
Top Contributor
A certain town’s economic development council has 21 members. If the number of females on the council is 3 less than 3 times the number of males on the council, then the town’s economic development council has how many male members?

(A) 5
(B) 6
(C) 7
(D) 9
(E) 15

Let M = the number of males

The number of females on the council is 3 less than 3 times the number of males on the council
So, 3M - 3 = the number of females

The town’s economic development council has 21 members.
So, (# of males) + (# of females) = 21
We get: M + (3M - 3) = 21
Simplify: 4M - 3 = 21
So: 4M = 24
Solve: M = 6