Find all School-related info fast with the new School-Specific MBA Forum

It is currently 30 Apr 2016, 20:04
GMAT Club Tests

Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

In a certain class, boys' heights range is 10 inches, and

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Manager
Manager
avatar
Joined: 10 Feb 2011
Posts: 114
Followers: 1

Kudos [?]: 167 [0], given: 10

In a certain class, boys' heights range is 10 inches, and [#permalink]

Show Tags

New post 04 Mar 2011, 19:42
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

53% (01:27) correct 47% (00:38) wrong based on 32 sessions

HideShow timer Statictics

In a certain class, boys' heights range is 10 inches, and girls' height range is 8 inches. What is heights' range for all of the students?

(1) The shortest boy is 2 inches taller than the tallest girl.
(2) The tallest girl in the class is 72 inches in height.
[Reveal] Spoiler: OA
1 KUDOS received
Director
Director
avatar
Status: Matriculating
Affiliations: Chicago Booth Class of 2015
Joined: 03 Feb 2011
Posts: 920
Followers: 13

Kudos [?]: 289 [1] , given: 123

Reviews Badge
Re: 231. In a certain class, boys' heights range is 10 inches. [#permalink]

Show Tags

New post 04 Mar 2011, 20:21
1
This post received
KUDOS
Tricky one. language is issue.
1)
The shortest boy is 2+8 inches taller than the shortest girl.
The tallest boy is 10 inches taller than the shortest boy
Hence range is 2+ 8 + 10 = 20

2) Insufficient

Hence A.

banksy wrote:
231. In a certain class, boys' heights range is 10 inches, and girls' height range is 8 inches. What is heights' range for all of the students?
(1) The shortest boy is 2 inches taller than the tallest girl.
(2) The tallest girl in the class is 72 inches in height.
SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1673
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 33

Kudos [?]: 434 [0], given: 36

Premium Member Reviews Badge
Re: 231. In a certain class, boys' heights range is 10 inches. [#permalink]

Show Tags

New post 04 Mar 2011, 21:26
Answer is A, as from 1 we have :

tallest boy - shortest boy = 8

And shortest boy - tallest girl = 2

And tallest girl - shortest girl = 10

Adding all 3 we can get tallest boy - shortest girl = 20.

From (2), nothing given about relationship between girls' and boys' height, so not enough.
_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

GMAT Club Premium Membership - big benefits and savings

Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 32549
Followers: 5632

Kudos [?]: 68314 [0], given: 9797

Re: 231. In a certain class, boys' heights range is 10 inches. [#permalink]

Show Tags

New post 05 Mar 2011, 03:37
Expert's post
banksy wrote:
231. In a certain class, boys' heights range is 10 inches, and girls' height range is 8 inches. What is heights' range for all of the students?
(1) The shortest boy is 2 inches taller than the tallest girl.
(2) The tallest girl in the class is 72 inches in height.


The range of a set is the difference between the largest and smallest elements of a set.

So, we have:
{tallest boy} - {shortest boy} = 10;
{tallest girl} - {shortest girl} = 8;

(1) The shortest boy is 2 inches taller than the tallest girl --> so we have:

{shortest girl} ----(8)----{tallest girl}-(2)-{shortest boy}-----(10)-----{tallest boy}

So, {the range for all of the students} = {girls' range} + 2 + {boys' range} = 20. Sufficient.

(2) The tallest girl in the class is 72 inches in height. Clearly insufficient.

Answer: A.

Similar question: ds-question-need-help-103941.html
_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Senior Manager
Senior Manager
User avatar
Joined: 15 Oct 2015
Posts: 369
Concentration: Finance, Strategy
Followers: 2

Kudos [?]: 19 [0], given: 209

GMAT ToolKit User CAT Tests
Re: In a certain class, boys' heights range is 10 inches, and [#permalink]

Show Tags

New post 15 Mar 2016, 08:55
banksy wrote:
In a certain class, boys' heights range is 10 inches, and girls' height range is 8 inches. What is heights' range for all of the students?

(1) The shortest boy is 2 inches taller than the tallest girl.
(2) The tallest girl in the class is 72 inches in height.



this is really a tricky question. I started out getting this into algebra and got stuck. The best manner to solve this is to put your head into the question and knowing difference very well not just knowing that difference means 3 minus 1 equals 2.
what is range for all student?
Answer: this has to be the number of numbers between the smallest numbner and the greatest number.
1) tells us to add to the the two ranges and get the answer
Re: In a certain class, boys' heights range is 10 inches, and   [#permalink] 15 Mar 2016, 08:55
    Similar topics Author Replies Last post
Similar
Topics:
For the students in class A, the range of their heights is r ...... aadirenpronk 0 25 Feb 2016, 06:54
7 Experts publish their posts in the topic The range of the heights of the female students in a certain class is Bunuel 4 12 May 2015, 04:58
6 Experts publish their posts in the topic In a certain class, the ratio of girls to boys is 5:4 Dhairya275 6 22 Sep 2013, 13:57
59 Experts publish their posts in the topic For the students in class A, the range of their heights is r BANON 19 23 Feb 2012, 08:12
1 For the students in class A, the range of heights is "r mydreammba 5 22 Oct 2011, 23:26
Display posts from previous: Sort by

In a certain class, boys' heights range is 10 inches, and

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.