GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 24 Mar 2019, 20:42

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.

Close

Request Expert Reply

Confirm Cancel

If the average (arithmetic mean) of a and – 5 is 10, then a =

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 53801
If the average (arithmetic mean) of a and – 5 is 10, then a =  [#permalink]

Show Tags

New post 14 Jan 2019, 04:15
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

90% (00:20) correct 10% (00:16) wrong based on 26 sessions

HideShow timer Statistics

Intern
Intern
avatar
B
Joined: 02 Mar 2016
Posts: 2
Location: India
Concentration: Finance, Technology
GPA: 3.66
Re: If the average (arithmetic mean) of a and – 5 is 10, then a =  [#permalink]

Show Tags

New post 14 Jan 2019, 04:39
avg= (a+(-5))/2 .............eq(1)
avg= 10 (given) .............eq(2)
from eq (1) and eq(2)
=> (a+(-5))/2=10
=> (a+(-5))=20
=> a-5 =20
=> a =25
Answer (A)
VP
VP
User avatar
P
Joined: 31 Oct 2013
Posts: 1273
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: If the average (arithmetic mean) of a and – 5 is 10, then a =  [#permalink]

Show Tags

New post 14 Jan 2019, 04:47
Bunuel wrote:
If the average (arithmetic mean) of a and – 5 is 10, then a =

A. 25
B. 15
C. 5
D. -10
E. -15



a + ( -5) / 2 = 10

a - 5 = 20

a = 25.

A is the correct answer.
Manager
Manager
User avatar
G
Joined: 13 Jan 2018
Posts: 245
Location: India
Concentration: Operations, General Management
GMAT 1: 580 Q47 V23
GMAT 2: 640 Q49 V27
GPA: 4
WE: Consulting (Consulting)
Reviews Badge
Re: If the average (arithmetic mean) of a and – 5 is 10, then a =  [#permalink]

Show Tags

New post 14 Jan 2019, 05:02
\(\frac{a - 5}{2}\) = 10

a = 25

OPTION: A
_________________
____________________________
Regards,

Chaitanya


+1 Kudos

if you like my explanation!!!
Target Test Prep Representative
User avatar
P
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 5431
Location: United States (CA)
Re: If the average (arithmetic mean) of a and – 5 is 10, then a =  [#permalink]

Show Tags

New post 14 Jan 2019, 18:59
Bunuel wrote:
If the average (arithmetic mean) of a and – 5 is 10, then a =

A. 25
B. 15
C. 5
D. -10
E. -15


We use the formula for the average to create the equation:

(a + (-5))/2 = 10

a - 5 = 20

a = 25

Answer: A
_________________

Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
TTP - Target Test Prep Logo
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

GMAT Club Bot
Re: If the average (arithmetic mean) of a and – 5 is 10, then a =   [#permalink] 14 Jan 2019, 18:59
Display posts from previous: Sort by

If the average (arithmetic mean) of a and – 5 is 10, then a =

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.