It is currently 24 Nov 2017, 06:20

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

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

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Manager
Manager
avatar
Joined: 10 Feb 2011
Posts: 112

Kudos [?]: 374 [0], given: 10

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

Show Tags

New post 04 Mar 2011, 19:42
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

47% (00:33) correct 53% (00:45) wrong based on 59 sessions

HideShow timer Statistics

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

Kudos [?]: 374 [0], given: 10

1 KUDOS received
Director
Director
avatar
Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 03 Feb 2011
Posts: 871

Kudos [?]: 401 [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.

Kudos [?]: 401 [1], given: 123

TOEFL Forum Moderator
avatar
Joined: 16 Nov 2010
Posts: 1602

Kudos [?]: 601 [0], given: 40

Location: United States (IN)
Concentration: Strategy, Technology
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

Kudos [?]: 601 [0], given: 40

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42356

Kudos [?]: 133204 [0], given: 12439

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

Show Tags

New post 05 Mar 2011, 03:37
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: Ultimate GMAT Quantitative Megathread | 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

Kudos [?]: 133204 [0], given: 12439

Senior Manager
Senior Manager
User avatar
Joined: 15 Oct 2015
Posts: 366

Kudos [?]: 165 [0], given: 211

Concentration: Finance, Strategy
GPA: 3.93
WE: Account Management (Education)
GMAT ToolKit User
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

Kudos [?]: 165 [0], given: 211

Re: In a certain class, boys' heights range is 10 inches, and   [#permalink] 15 Mar 2016, 08:55
Display posts from previous: Sort by

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

  new topic post reply 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 | 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®.