NEW HERE? LEARN MORE
closeclose
It is currently 17 Apr 2024, 23:05
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 of 7 numbers is 72, how many of the numbers

7 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
BN1989
Manager
Manager
Joined: 12 Oct 2011
Posts: 100
GMAT 1: 700 Q48 V37
GMAT 2: 720 Q48 V40
If the average of 7 numbers is 72, how many of the numbers [#permalink] New post  20 Mar 2012, 13:43
2
Kudos
2
Bookmarks
00:00
A
B
C
D
E

Difficulty:

25% (medium)

Question Stats:

75% (01:17) correct 25% (01:05) wrong based on 105 sessions
Hide Show timer Statistics
If the average of 7 numbers is 72, how many of the numbers are equal to 72?

(1) Of the seven numbers, six are odd integers, and the average of those integers is 72.
(2) At least one of the numbers is equal to 72.
ShowHide Answer
Official Answer
Official Answer and Stats are available only to registered users. Register/Login.
request expert reply
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92741
CAT Tests Forum Quiz Mode
Re: If the average of 7 numbers is 72, how many of the numbers [#permalink] New post  20 Mar 2012, 13:56
3
Kudos
Expert Reply
If the average of 7 numbers is 72, how many of the numbers are equal to 72?

(1) Of the seven numbers, six are odd integers, and the average of those integers is 72 --> since 6 out of 7 numbers are odd then none of them is equal to 72. Now, since the average of these 6 numbers is 72 then the 7th number must equal to 72 in order the overall average to be 72, which means that there are only one number equal to 72. Sufficient.

(2) At least one of the numbers is equal to 72. Not sufficient.

Answer: A.
_________________
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
L
GyanOne
CEO
CEO
Joined: 24 Jul 2011
Status: World Rank #4 MBA Admissions Consultant
Posts: 3187
GMAT 1: 780 Q51 V48
GRE 1: Q170 V170
Re: How many numbers are equivalent to 72? [#permalink] New post  01 Apr 2012, 11:26
1
Kudos
Expert Reply
Clearly (A).

Statement 1: If six of the seven integers are odd and their average is 72, it follows that the last (seventh) integer has to be 72 as well. Also, as the first six integers are odd, there is just one 72 in the set. Sufficient.

Statement 2: If one or more of the numbers is 72, the remaining numbers in the set can be a combination of less, more, or equal to 72. So we can have all 72s, or some more than 72 and some less, or some more than 72, some less, and some equal to 72. This makes the number of 72s uncertain. Insufficient.

Therefore (A)
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92741
CAT Tests Forum Quiz Mode
Re: If the average of 7 numbers is 72, how many of the numbers [#permalink] New post  28 May 2013, 05:29
Expert Reply
Bumping for review and further discussion.
_________________
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
madzstar
Intern
Intern
Joined: 24 Apr 2013
Posts: 35
Schools: Duke '16
Re: If the average of 7 numbers is 72, how many of the numbers [#permalink] New post  28 May 2013, 15:20
The way you guys reason it out makes it harder for me to understand
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92741
CAT Tests Forum Quiz Mode
Re: If the average of 7 numbers is 72, how many of the numbers [#permalink] New post  28 May 2013, 15:25
Expert Reply
madzstar wrote:
The way you guys reason it out makes it harder for me to understand


Can you please tell me which part was unclear to you so that to elaborate it more?
_________________
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
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 32535
Re: If the average of 7 numbers is 72, how many of the numbers [#permalink] New post  25 Sep 2019, 05:17
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources
Signature Read More
GMAT Club Bot
gmatclubot
Re: If the average of 7 numbers is 72, how many of the numbers [#permalink]
25 Sep 2019, 05:17
NEW TOPIC
POST REPLY
Downloads
My Bookmarks
Reviews
Moderator:
Bunuel
Math Expert
92741 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