NEW HERE? LEARN MORE
closeclose
It is currently 16 Apr 2024, 13:48
Register
GMAT Focus Tests
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th

8 posts Go to First Unread Post
Print view
NEW TOPIC
POST REPLY
Question banks

GMAT Question Banks

Downloads
My Bookmarks
Reviews
SORT BY:
Date
Kudos
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92698
CAT Tests Forum Quiz Mode
If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  30 Aug 2018, 00:32
Expert Reply
00:00
A
B
C
D
E

Difficulty:

15% (low)

Question Stats:

84% (01:06) correct 16% (01:10) wrong based on 51 sessions
Hide Show timer Statistics
If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is the average of a, b, c, and 13?

(A) 8
(B) 8.5
(C) 9
(D) 9.5
(E) It cannot be determined from the information given.
ShowHide Answer
Official Answer
Official Answer and Stats are available only to registered users. Register/Login.

_________________
New to the GMAT CLUB Forum?

My Signature Questions' Collection:


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics
Signature Read More
User avatar
B
raks85
Intern
Intern
Joined: 28 Oct 2017
Posts: 36
Location: India
Schools: ISB '20 (WA) IIM (A)
GMAT 1: 640 Q47 V32
GMAT 2: 710 Q49 V38
Reviews Badge
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  30 Aug 2018, 00:54
a+b+c+5+6=5*6
-> a+b+c = 19
-> a+b+c+13 = 32
-> (a+b+c+13)/ 4 = 32/4 = 8, hence option (A)
avatar
B
mahi816
Intern
Intern
Joined: 26 Dec 2016
Posts: 28
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  30 Aug 2018, 01:04
very basic question.

(a+b+c+5+6)/5=6, so a+b+c=19.

(a+b+c+13)/4=(19+13)/4=8

ANS.A
User avatar
D
PKN
Director
Director
Joined: 01 Oct 2017
Status:Learning stage
Posts: 827
WE:Supply Chain Management (Energy and Utilities)
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  30 Aug 2018, 01:09
Bunuel wrote:
If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is the average of a, b, c, and 13?

(A) 8
(B) 8.5
(C) 9
(D) 9.5
(E) It cannot be determined from the information given.


Given, a+b+c+5+6=5*6=30
Or, a+b+c+5+6+2=30+2=32
Or, \(\frac{a+b+c+13}{4}=\frac{32}{4}=8\)
Or, average of a, b, c, and 13 is 8

Ans. (A)
_________________
Regards,

PKN

Rise above the storm, you will find the sunshine
Signature Read More
User avatar
D
KSBGC
VP
VP
Joined: 31 Oct 2013
Posts: 1260
Concentration: Accounting, Finance
GPA: 3.68
WE:Analyst (Accounting)
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  30 Aug 2018, 06:14
Bunuel wrote:
If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is the average of a, b, c, and 13?

(A) 8
(B) 8.5
(C) 9
(D) 9.5
(E) It cannot be determined from the information given.



\(\frac{a + b + c + d + 5 + 6}{5 = 6}\)

a + b + c + d + 11 = 30

a + b + c = 19

a + b + c + 13 / 4

\(\frac{19 + 13}{4}\)

= \(\frac{32}{4}\)

= 8

The best answer is A.
User avatar
L
Abhishek009
Board of Directors
Joined: 11 Jun 2011
Status:QA & VA Forum Moderator
Posts: 6075
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
GMAT ToolKit User
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  30 Aug 2018, 07:12
Bunuel wrote:
If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is the average of a, b, c, and 13?

(A) 8
(B) 8.5
(C) 9
(D) 9.5
(E) It cannot be determined from the information given.

\(a + b + c + 5 + 6 = 30\)

So, \(a + b + c = 19\)

So, the average of a, b, c, and 13 = \(\frac{19 + 13}{4} = 8\) Answer must be (A)
_________________
Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )
Signature Read More
User avatar
P
JeffTargetTestPrep
Target Test Prep Representative
Joined: 04 Mar 2011
Status:Head GMAT Instructor
Affiliations: Target Test Prep
Posts: 3043
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  04 Sep 2018, 04:38
Expert Reply
Bunuel wrote:
If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is the average of a, b, c, and 13?

(A) 8
(B) 8.5
(C) 9
(D) 9.5
(E) It cannot be determined from the information given.



We can create the equation:

(a + b + c + 5 + 6)/5 = 6

a + b + c + 11 = 30

a + b + c = 19

So the average of a, b, c, and 13 is:

(a + b + c + 13)/4

(19 + 13)/4

32/4 = 8

Answer: A
_________________
See why Target Test Prep is the top rated GMAT course on GMAT Club. Read Our Reviews
Signature Read More
User avatar
D
BrushMyQuant
Tutor
Joined: 05 Apr 2011
Status:Tutor - BrushMyQuant
Posts: 1775
Location: India
Concentration: Finance, Marketing
Schools: XLRI (A)
GMAT 1: 700 Q51 V31
GPA: 3
WE:Information Technology (Computer Software)
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink] New post  05 Aug 2022, 23:54
Expert Reply
Top Contributor
Theory

    ➡ Average = Sum of all the Values / Total Number of Values

The average (arithmetic mean) of a, b, c, 5, and 6 is 6

Average = \(\frac{Sum}{5}\) = \(\frac{a + b + c + 5 + 6 }{5}\) = \(\frac{a + b + c + 11}{5}\) = 6 (given)
a + b + c + 11 = 6*5 = 30
=> a + b + c = 30 - 11 = 19

The average of a, b, c, and 13

Average = \(\frac{Sum}{4}\) = \(\frac{a + b + c + 13 }{4}\) = \(\frac{19 + 13}{4}\) = \(\frac{32}{4}\) = 8

So, Answer will be A.
Hope it helps!

Watch the following video to Learn the Basics of Statistics


_________________
How to Solve :
All Quant Topics Theory || Units' Digit Problems || Absolute Value Basics || Inequalities || Absolute Value + Inequality || Functions and Custom Characters || LCM & GCD || Remainders || Factors and Multiples || Arithmetic and Geometric Progression || Co-ordinate Geometry || Circles || Probability: Coin Toss || Work Rate || Statistics || Stem & Leaf Plot || Box And Whisker Plot

GMAT Club Topic Wise Problems
Signature Read More
GMAT Club Bot
gmatclubot
Re: If the average (arithmetic mean) of a, b, c, 5, and 6 is 6, what is th [#permalink]
05 Aug 2022, 23:54
NEW TOPIC
POST REPLY
Downloads
My Bookmarks
Reviews
Moderators:
Bunuel
Math Expert
92698 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

cron

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions