Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 26 May 2017, 19:45

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 June
Open Detailed Calendar

Rule of three - Conceptual question

Author Message
TAGS:

Hide Tags

Manager
Joined: 11 Aug 2012
Posts: 128
Schools: HBS '16, Stanford '16
Followers: 1

Kudos [?]: 114 [0], given: 16

Rule of three - Conceptual question [#permalink]

Show Tags

17 Dec 2012, 15:20
I know that I have to use the "rule of three" when the relationship between the variables is direct and proportional. Identifying that the relationship is direct is easy; however, I don't know how to be sure that that the relationship is proportional. Is there a method or tecnique to confirm that?

For example,
If 7 candies represent the 35% of a bag of candies, how many candies are in the bag?
Common sense tells me that I have to use the rule of three:

7 ----- 35
x ----- 100

x = 20

Although that's the correct answer I was not sure that the relationship is proportional. How to confirm that in this problem and in more complex questions?
Thanks!
Director
Status: Tutor - BrushMyQuant
Joined: 05 Apr 2011
Posts: 614
Location: India
Concentration: Finance, Marketing
Schools: XLRI (A)
GMAT 1: 570 Q49 V19
GMAT 2: 700 Q51 V31
GPA: 3
WE: Information Technology (Computer Software)
Followers: 108

Kudos [?]: 652 [0], given: 57

Re: Rule of three - Conceptual question [#permalink]

Show Tags

17 Dec 2012, 21:52
danzig wrote:
I know that I have to use the "rule of three" when the relationship between the variables is direct and proportional. Identifying that the relationship is direct is easy; however, I don't know how to be sure that that the relationship is proportional. Is there a method or tecnique to confirm that?

For example,
If 7 candies represent the 35% of a bag of candies, how many candies are in the bag?
Common sense tells me that I have to use the rule of three:

7 ----- 35
x ----- 100

x = 20

Although that's the correct answer I was not sure that the relationship is proportional. How to confirm that in this problem and in more complex questions?
Thanks!

I will say if you can write something in the form

If k1 times x imples y
Then k2 times x implies ???

What I mean to say is if you can write something in the form

If some part of something(say x) implies something (say y)
Then some other part of something (x) implies ???

Good luck.
_________________

Ankit

Check my Tutoring Site -> Brush My Quant

GMAT Quant Tutor
How to start GMAT preparations?
How to Improve Quant Score?
Gmatclub Topic Tags
Check out my GMAT debrief

How to Solve :
Statistics || Reflection of a line || Remainder Problems || Inequalities

Re: Rule of three - Conceptual question   [#permalink] 17 Dec 2012, 21:52
Similar topics Replies Last post
Similar
Topics:
1 Permutation and Combination Conceptual Question 4 20 May 2014, 07:38
1 Conceptual question 6 10 Sep 2012, 22:54
General Rule regarding Remainder questions 2 18 Jan 2012, 16:38
General Math Rule Question 2 10 Jan 2012, 18:34
17 Probability Basics Rules & Questions (43) 7 14 May 2016, 06:51
Display posts from previous: Sort by