It is currently 24 Feb 2018, 10:18

### 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

# Ten different items are for sale in a store, and each is

Author Message
TAGS:

### Hide Tags

Intern
Joined: 22 Jun 2012
Posts: 13
Location: India
GPA: 3.09
Ten different items are for sale in a store, and each is [#permalink]

### Show Tags

26 Jun 2012, 06:32
2
This post was
BOOKMARKED
00:00

Difficulty:

65% (hard)

Question Stats:

58% (00:55) correct 42% (01:06) wrong based on 89 sessions

Ten different items are for sale in a store, and each is sold at a different price. The average (arithmetic mean) price of these 10 items is $165. If the prices of all the items are changed, will the average price increase? (1) The five most expensive items each increased in price by 10%. (2) The five least expensive items each decreased in price by 10%. [Reveal] Spoiler: OA _________________ \sqrt{[square_root][square_root][square_root][square_root][square_root]}[/square_root][/square_root][/square_root][/square_root][/square_root]???????? Last edited by Bunuel on 26 Jun 2012, 06:36, edited 1 time in total. Edited the question Math Expert Joined: 02 Sep 2009 Posts: 43896 Re: Ten different items are for sale in a store, and each is [#permalink] ### Show Tags 26 Jun 2012, 07:01 1 This post received KUDOS Expert's post Ten different items are for sale in a store, and each is sold at a different price. The average (arithmetic mean) price of these 10 items is$165. If the prices of all the items are changed, will the average price increase?

The question basically asks whether there will be an increase in total price of those 10 items after the price change.

(1) The five most expensive items each increased in price by 10%. Not sufficient since we know nothing about the other items.
(2) The five least expensive items each decreased in price by 10%. Not sufficient since we know nothing about the other items.

(1)+(2) 10% of the total price of 5 most expensive items is clearly more than 10% of the total price of 5 least expensive items, so overall there will be an increase in total price. Sufficient.

Hope it's clear.
_________________
Intern
Joined: 22 Jun 2012
Posts: 13
Location: India
GPA: 3.09
Re: Ten different items are for sale in a store, and each is [#permalink]

### Show Tags

26 Jun 2012, 08:28
WOW !!! i cant believe it was that simple... explanation given in there was pretty crappy one.. Thanks Bunuel
_________________

\sqrt{[square_root][square_root][square_root][square_root][square_root]}[/square_root][/square_root][/square_root][/square_root][/square_root]????????

Non-Human User
Joined: 09 Sep 2013
Posts: 13764
Re: Ten different items are for sale in a store, and each is [#permalink]

### Show Tags

22 May 2017, 00:58
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.
_________________
Re: Ten different items are for sale in a store, and each is   [#permalink] 22 May 2017, 00:58
Display posts from previous: Sort by