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

It is currently 29 Aug 2014, 14:16

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

A student finds the average of 10 positive integers. Each

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
CEO
CEO
avatar
Joined: 15 Aug 2003
Posts: 3470
Followers: 60

Kudos [?]: 666 [0], given: 781

A student finds the average of 10 positive integers. Each [#permalink] New post 08 Oct 2003, 17:10
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A student finds the average of 10 positive integers. Each integer contains two digits. By mistake, the boy interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What was the difference of the two digits a and b?

1) 8
2) 6
3) 2
4) 4
Intern
Intern
avatar
Joined: 29 Aug 2003
Posts: 49
Location: Detroit, MI
Followers: 0

Kudos [?]: 1 [0], given: 0

Re: PS : Digits [#permalink] New post 08 Oct 2003, 17:27
praetorian123 wrote:
A student finds the average of 10 positive integers. Each integer contains two digits. By mistake, the boy interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What was the difference of the two digits a and b?

1) 8
2) 6
3) 2
4) 4


Ans: 2 - Option 3

Say, sum of the 9 correct numbers is S

So, (S + (10a + b))/10 - (S + (10b + a))/10 = 1.8
=> 9a - 9b = 18
=> a - b = 2.
Re: PS : Digits   [#permalink] 08 Oct 2003, 17:27
    Similar topics Author Replies Last post
Similar
Topics:
1 Experts publish their posts in the topic x, y, and z are three positive integers whose average is 10 WoundedTiger 2 29 Jan 2014, 04:01
6 Experts publish their posts in the topic If the average of 5 positive integers is 40 and the nafishasan60 4 04 Feb 2012, 03:15
1 The average score on a test taken by 10 students was X. If hardaway7 2 28 Dec 2008, 14:08
If the average of positive integers x, y, and z is 10, what arjtryarjtry 4 25 Jul 2008, 02:45
Three positive integers: m. n and q, their average is 10, blog 10 03 Feb 2008, 00:10
Display posts from previous: Sort by

A student finds the average of 10 positive integers. Each

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| 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®.