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

It is currently 02 Sep 2014, 08:57

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

What is the average of 8a and 4b? 1. a+b=5 2. 2a+b=11

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 05 Nov 2005
Posts: 34
Followers: 0

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

What is the average of 8a and 4b? 1. a+b=5 2. 2a+b=11 [#permalink] New post 20 Nov 2005, 14:30
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Q1. What is the average of 8a and 4b?
1. a+b=5
2. 2a+b=11
VP
VP
avatar
Joined: 06 Jun 2004
Posts: 1062
Location: CA
Followers: 2

Kudos [?]: 23 [0], given: 0

GMAT Tests User
 [#permalink] New post 20 Nov 2005, 14:34
Answer is B.

(8a+4b)/2 ==> 4(2a+b)/2

(1) We do not know the values of a and b. Insufficient.

(2) 2a+b = 11, we know the average is 4(11)/2. Sufficient.
Senior Manager
Senior Manager
User avatar
Joined: 14 Apr 2005
Posts: 422
Location: India, Chennai
Followers: 1

Kudos [?]: 3 [0], given: 0

GMAT Tests User
Re: DS-average [#permalink] New post 21 Nov 2005, 00:24
faisalt wrote:
Q1. What is the average of 8a and 4b?
1. a+b=5
2. 2a+b=11


Its B.
Multiply both sides of statemen2 by 4 we get
8a + 4b = 44 Hence the answer.
Director
Director
avatar
Joined: 27 Jun 2005
Posts: 517
Location: MS
Followers: 2

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

GMAT Tests User
 [#permalink] New post 21 Nov 2005, 11:40
one more vote for B

Q1. What is the average of 8a and 4b?
1. a+b=5

We need to know the sum of 8a+4b , can not be calculated from a+b. Hence Insuff

2. 2a+b=11

8a+4b= 4(2a+b)=4*11

average 4*11/2

Suff

so B
Current Student
User avatar
Joined: 29 Jan 2005
Posts: 5253
Followers: 23

Kudos [?]: 127 [0], given: 0

GMAT Tests User Reviews Badge
 [#permalink] New post 23 Nov 2005, 05:09
1. 8a+4b cannot determine a+b in the sum so insufficent

2. 4(2a+b); substitute 11--->4(11)=44 sufficient

(B)
  [#permalink] 23 Nov 2005, 05:09
    Similar topics Author Replies Last post
Similar
Topics:
What is the perimeter of right triangle ABC? (1) AB = 5 (2) dreambeliever 6 01 Jun 2011, 06:07
1 A Simple but confusing DS [ 8^a(1/4)^b = ? ] alive 7 17 Oct 2008, 00:43
Does a=b? 1. {a-b}/{5}=0 2. {a+b}/5}=0 vr4indian 2 27 Sep 2008, 17:20
8a(1/4)b = ? (1) b = 1.5a (2) a = 2 ArvGMAT 4 24 Jun 2007, 15:19
1 8^a)*(1/4)^b = ? (1) b = 1.5a (2) a = 2 GMATT73 2 18 Dec 2005, 02:04
Display posts from previous: Sort by

What is the average of 8a and 4b? 1. a+b=5 2. 2a+b=11

  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®.