NEW HERE? LEARN MORE
closeclose
Last visit was: 24 Apr 2024, 19:07 It is currently 24 Apr 2024, 19:07
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

A certain language school has two classes for children. Is the range

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92900
Own Kudos [?]: 618823 [5]
Given Kudos: 81588
Send PM
CAT Tests Forum Quiz Mode
A certain language school has two classes for children. Is the range [#permalink] New post   15 Jun 2020, 04:04
5
Bookmarks
Expert Reply
00:00
A
B
C
D
E

Difficulty:

5% (low)

Question Stats:

92% (01:10) correct 8% (01:25) wrong based on 212 sessions
Hide Show timer Statistics
A certain language school has two classes for children. Is the range of ages, in years, of the children in the first class equal to the range of ages, in years, of the children in the second class?

(1) In each class, the number of children is 18 and the age of the youngest child is 8 years.
(2) In each class, the average (arithmetic mean) age of the children is 10 years.

 
ShowHide Answer
Official Answer
E
User avatar
P
RaghavKhanna
Senior Manager
Senior Manager
Joined: 03 May 2020
Posts: 267
Own Kudos [?]: 296 [1]
Given Kudos: 675
Location: India
Concentration: Marketing, Strategy
GMAT 1: 700 Q47 V39
Send PM
Re: A certain language school has two classes for children. Is the range [#permalink] New post   Updated on: 15 Jun 2020, 05:04
1
Bookmarks
Range of children in a class = Maximum age of a child - Minimum age of a child

To evaluate: Range 1 = Range 2

St. 1:
Minimum age is given, but no information about the maximum age in each class.

=> St. 1 is insufficient.

St. 2:
Only information about the mean.
We can't determine the max and min values in each class.

=> St. 2 is insufficient.

St. 1 and St. 2 together:
Sum of ages of all students in each class = 18*10 = 180 years

Age of youngest student in each class = 8

=> Sum of ages of other 17 students in each class = 172 years

We still can't find the age of the eldest student as any there could be many cases in which the sum of ages of 17 students equals 172 years.

=> Both 1 and 2 together are also insufficient.

=> Answer: E

Originally posted by RaghavKhanna on 15 Jun 2020, 04:21.
Last edited by RaghavKhanna on 15 Jun 2020, 05:04, edited 1 time in total.
User avatar
S
Babineaux
Manager
Manager
Joined: 24 May 2018
Posts: 96
Own Kudos [?]: 98 [1]
Given Kudos: 35
Location: India
Concentration: General Management, Human Resources
WE:Engineering (Energy and Utilities)
Send PM
Re: A certain language school has two classes for children. Is the range [#permalink] New post   15 Jun 2020, 04:57
1
Bookmarks
Statement 1 :
Here only the age of youngest child is given, i.e., 8 years.
And the total number of children is 18.
From here we are unable to determine the range of ages of each class.
Thus insufficient.

Statement 2:
Here the average age of the children in given, i.e., 10 years.
Which is just insufficient to calculate the range of the ages.

Combining both statement, (for each class)
Here we can get the age of the eldest child, say X.
Now, (8 + X) / 2 = 10,
Or, X = 12,

Now the range will be 12 - 8 = 4.

Combining works.
Thus Sufficient.

IMO ans is C.
User avatar
G
sambitspm
Senior Manager
Senior Manager
Joined: 05 Aug 2019
Posts: 317
Own Kudos [?]: 279 [0]
Given Kudos: 130
Location: India
Concentration: Leadership, Technology
GMAT 1: 600 Q50 V22
GMAT 2: 670 Q50 V28 (Online)
GPA: 4
Send PM
Re: A certain language school has two classes for children. Is the range [#permalink] New post   15 Jun 2020, 07:34
Kindly see the attachment.

Even both statements are insufficient together.
E
Attachments

1.PNG
1.PNG [ 31.74 KiB | Viewed 8054 times ]

User avatar
L
ShankSouljaBoi
Director
Director
Joined: 21 Jun 2017
Posts: 638
Own Kudos [?]: 530 [1]
Given Kudos: 4092
Location: India
Concentration: Finance, Economics
Schools: Rotman '23 (D) IIMA PGPX'22 (D) Desautels '23 (D) Schulich Sept '23 (D) WBS (D) IIML IPMX'25 (A)
GMAT 1: 660 Q49 V31
GMAT 2: 620 Q47 V30
GMAT 3: 650 Q48 V31
GPA: 3.1
WE:Corporate Finance (Non-Profit and Government)
Send PM
Reviews Badge
Re: A certain language school has two classes for children. Is the range [#permalink] New post   27 Dec 2020, 08:43
1
Kudos
Dear Bunuel ,

Please tag this question --- GMATPREP EP6


Best !!
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92900
Own Kudos [?]: 618823 [0]
Given Kudos: 81588
Send PM
CAT Tests Forum Quiz Mode
Re: A certain language school has two classes for children. Is the range [#permalink] New post   27 Dec 2020, 10:12
Expert Reply
ShankSouljaBoi wrote:
Dear Bunuel ,

Please tag this question --- GMATPREP EP6


Best !!



________________
Done. Thank you!
User avatar
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 32657
Own Kudos [?]: 821 [0]
Given Kudos: 0
Send PM
Re: A certain language school has two classes for children. Is the range [#permalink] New post   25 Jan 2024, 01:55
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
gmatclubot
Re: A certain language school has two classes for children. Is the range [#permalink]
25 Jan 2024, 01:55
Moderator:
Bunuel
Math Expert
92900 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions