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

 It is currently 21 Sep 2019, 13:03

### 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

# The average (arithmetic mean) of a set of n numbers is 75. If adding

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

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 58133
The average (arithmetic mean) of a set of n numbers is 75. If adding  [#permalink]

### Show Tags

22 Aug 2019, 00:04
00:00

Difficulty:

15% (low)

Question Stats:

96% (01:29) correct 4% (04:16) wrong based on 23 sessions

### HideShow timer Statistics

The average (arithmetic mean) of a set of n numbers is 75. If adding the number 160 in the set raises the average to 80, what is the value of n?

A. 20
B. 16
C. 8
D. 6
E. 4

_________________
Senior Manager
Joined: 30 Sep 2017
Posts: 343
Concentration: Technology, Entrepreneurship
GMAT 1: 720 Q49 V40
GPA: 3.8
WE: Engineering (Real Estate)
Re: The average (arithmetic mean) of a set of n numbers is 75. If adding  [#permalink]

### Show Tags

22 Aug 2019, 00:16
The sum of a set of $$n$$ numbers is $$75n$$.

75n + 160 = 80(n+1)
--> 80 = 5n
--> n = 16

Posted from my mobile device
Re: The average (arithmetic mean) of a set of n numbers is 75. If adding   [#permalink] 22 Aug 2019, 00:16
Display posts from previous: Sort by

# The average (arithmetic mean) of a set of n numbers is 75. If adding

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

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