Last visit was: 21 Jul 2024, 22:41 It is currently 21 Jul 2024, 22:41
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
SORT BY:
Date
Math Expert
Joined: 02 Sep 2009
Posts: 94441
Own Kudos [?]: 642853 [0]
Given Kudos: 86716
Send PM
Senior Moderator - Masters Forum
Joined: 19 Jan 2020
Posts: 3128
Own Kudos [?]: 2815 [0]
Given Kudos: 1511
Location: India
GPA: 4
WE:Analyst (Internet and New Media)
Send PM
Kellogg School Moderator
Joined: 25 Aug 2015
Posts: 66
Own Kudos [?]: 93 [0]
Given Kudos: 81
Location: India
Schools: ISB '25 (A)
GMAT Focus 1:
655 Q85 V82 DI80
GMAT 1: 640 Q50 V26
GMAT 2: 660 Q47 V34
GPA: 3.0
Send PM
Retired Moderator
Joined: 05 May 2016
Posts: 767
Own Kudos [?]: 696 [0]
Given Kudos: 1316
Location: India
Send PM
Re: What is the average (arithmetic mean) of a, b, c, d, e, and f with a < [#permalink]
Bunuel wrote:
What is the average (arithmetic mean) of a, b, c, d, e, and f with a < b < c < d < e < f ?

(1) The average of d, e, and f is 11.
(2) The value of a is 5 and b + c + d + e + f = 51.


PS21260



Statement 1: The average of d, e, and f is 11.

Now we are given: a<b<c. The combination for them could be anything: a = 1, b=2, c = 3, or a= -3, b = -2 , c = -1. Since, we are not given the nature of the number, we have a wide range of possibilities.

Thus Insufficient.


Statement 2: (2) The value of a is 5 and b + c + d + e + f = 51.
Now,
a = 5,
b + c + d + e + f = 51.
=> a+ b + c + d + e + f = 56 = > average = 56/6.

Thus we have the average from this statement.
So Sufficient.


Answer B.
GMAT Club Legend
GMAT Club Legend
Joined: 12 Sep 2015
Posts: 6804
Own Kudos [?]: 30846 [2]
Given Kudos: 799
Location: Canada
Send PM
Re: What is the average (arithmetic mean) of a, b, c, d, e, and f with a < [#permalink]
2
Kudos
Expert Reply
Top Contributor
Bunuel wrote:
What is the average (arithmetic mean) of a, b, c, d, e, and f with a < b < c < d < e < f ?

(1) The average of d, e, and f is 11.
(2) The value of a is 5 and b + c + d + e + f = 51.
DS21260


Target question: What is the average (arithmetic mean) of a, b, c, d, e, and f

Statement 1: The average of d, e, and f is 11.
We can take this information and write: (d + e + f)/3 = 11, which means d + e + f = 33.
However, since we have no information about the value of a, b and c, there's no way to find the average of a, b, c, d, e, and f
Since we can't answer the target question with certainty, statement 1 is NOT SUFFICIENT

Statement 2: The value of a is 5 and b + c + d + e + f = 51.
Average of the 6 values = (a + b + c + d + e + f)/6
Substitute given values: = (5 +51)/6
Simplify: = 56/6
Since we can answer the target question with certainty, statement 2 is SUFFICIENT

Answer: B

Cheers,
Brent
GMAT Club Bot
Re: What is the average (arithmetic mean) of a, b, c, d, e, and f with a < [#permalink]
Moderator:
Math Expert
94441 posts