Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 19 May 2013, 15:38
Customize  |  Hide

Search
Register
New posts
Unanswered

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

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Intern
Intern
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, 15:30
00:00

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
Joined: 06 Jun 2004
Posts: 1068
Location: CA
Followers: 2

Kudos [?]: 12 [0], given: 0

GMAT Tests User
 [#permalink] New post 20 Nov 2005, 15:34
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: 15 Apr 2005
Posts: 425
Location: India, Chennai
Followers: 1

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

GMAT Tests User
Re: DS-average [#permalink] New post 21 Nov 2005, 01:24
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
User avatar
Joined: 27 Jun 2005
Posts: 518
Location: MS
Followers: 1

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

GMAT Tests User
 [#permalink] New post 21 Nov 2005, 12:40
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: 5289
Followers: 17

Kudos [?]: 90 [0], given: 0

GMAT Tests User Reviews Badge
 [#permalink] New post 23 Nov 2005, 06:09
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, 06:09
    Similar topics Author Replies Last post
Similar
Topics:
 New posts 8^a)*(1/4)^b = ? (1) b = 1.5a (2) a = 2 GMATT73 2 18 Dec 2005, 03:04
New posts 8a(1/4)b = ? (1) b = 1.5a (2) a = 2 ArvGMAT 4 24 Jun 2007, 16:19
New posts Does a=b? 1. {a-b}/{5}=0 2. {a+b}/5}=0 vr4indian 2 27 Sep 2008, 18:20
New posts 1 A Simple but confusing DS [ 8^a(1/4)^b = ? ] alive 7 17 Oct 2008, 01:43
New posts What is the perimeter of right triangle ABC? (1) AB = 5 (2) dreambeliever 6 01 Jun 2011, 07:07
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  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com