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

 It is currently 03 May 2015, 10:02

### 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

# A set has 16 numbers. If a number is three times the average

Author Message
TAGS:
Manager
Joined: 19 Aug 2006
Posts: 222
Followers: 1

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

A set has 16 numbers. If a number is three times the average [#permalink]  09 Nov 2006, 01:28
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A set has 16 numbers. If a number is three times the average of the other 15 numbers, the number is what fraction of the sum of the total numbers?
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5078
Location: Singapore
Followers: 22

Kudos [?]: 184 [0], given: 0

Let the sum of the 15 numbers be x
Let the number be A

Then, A = x/15

Sum of total numbers = x+A

Fraction = A/x+A = (x/15)/x+(x/15) = 1/16
Manager
Joined: 03 Nov 2006
Posts: 161
Followers: 2

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

ywilfred wrote:
Let the sum of the 15 numbers be x
Let the number be A

Then, A = x/15

Sum of total numbers = x+A

Fraction = A/x+A = (x/15)/x+(x/15) = 1/16

Ywilfred, A=3x/15 so their sum is 18x/15

The fraction is therefore 1/6
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5078
Location: Singapore
Followers: 22

Kudos [?]: 184 [0], given: 0

hosam wrote:
ywilfred wrote:
Let the sum of the 15 numbers be x
Let the number be A

Then, A = x/15

Sum of total numbers = x+A

Fraction = A/x+A = (x/15)/x+(x/15) = 1/16

Ywilfred, A=3x/15 so their sum is 18x/15

The fraction is therefore 1/6

oops... hahaha.. yeah, thanks for pointing that out. the method is still the same though..
VP
Joined: 21 Aug 2006
Posts: 1026
Followers: 1

Kudos [?]: 20 [0], given: 0

Let the average of 15 numbers is x
Average of 16th number is 3x
the proportion of 16th number = 3x/(3x+15x) = 1/6
_________________

The path is long, but self-surrender makes it short;
the way is difficult, but perfect trust makes it easy.

Similar topics Replies Last post
Similar
Topics:
7 A certain set of numbers has an average (arithmetic mean) of 7 21 Oct 2013, 19:13
23 A set of numbers contains 7 integers and has an average 21 15 May 2012, 00:36
1 A set of numbers has an average of 50. If the largest 3 12 Mar 2012, 21:38
Set X has 5 numbers and its average is greater than its 3 18 Nov 2006, 17:36
Averages of three sets A,B and C containing positive numbers 2 19 Jul 2006, 14:30
Display posts from previous: Sort by