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

 It is currently 07 Jul 2015, 09:54

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The average (arithmetic mean) of 3a + 4 and another number

Author Message
TAGS:
Senior Manager
Joined: 30 Aug 2003
Posts: 325
Location: dallas , tx
Followers: 1

Kudos [?]: 9 [0], given: 0

The average (arithmetic mean) of 3a + 4 and another number [#permalink]  23 Dec 2003, 19:23
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
The average (arithmetic mean) of 3a + 4 and another number is 2a. What is the average of the other number and a?

2a
a - 4
a - 2
a + 2
a + 4
_________________

shubhangi

GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4309
Followers: 29

Kudos [?]: 236 [0], given: 0

A)

I think this problem is from Kaplan

Let X be the other number
[(3a+4)+X]/2 = 2a
(3a+4)+X = 4a
X = a-4

Therefore:
[X+a]/2 = [(a-4)+a]/2 = [2a-4]/2 = a-2
Senior Manager
Joined: 30 Aug 2003
Posts: 325
Location: dallas , tx
Followers: 1

Kudos [?]: 9 [0], given: 0

yes its from kaplan
its a-2 right ?? then how is it choice A? it should be C.
_________________

shubhangi

GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4309
Followers: 29

Kudos [?]: 236 [0], given: 0

oops, I really meant C)
Similar topics Replies Last post
Similar
Topics:
8 The average (arithmetic mean) of four numbers is 4x + 3. If one of the 9 24 Nov 2014, 06:35
2 The average (arithmetic mean) of 4 positive integers is 50. 2 21 Dec 2013, 03:31
9 A certain set of numbers has an average (arithmetic mean) of 7 21 Oct 2013, 19:13
1 What is the average (arithmetic mean) of the numbers 15, 16, 3 17 Sep 2013, 16:34
The average (arithmetic mean) of 3a+4 and another number is 3 21 Mar 2008, 06:37
Display posts from previous: Sort by

# The average (arithmetic mean) of 3a + 4 and another number

 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®.