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

 It is currently 13 Aug 2018, 23:43

### 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

# gross profit

Author Message
Manager
Joined: 04 Sep 2006
Posts: 113

### Show Tags

24 May 2009, 09:03
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

A bookstore sells new book for \$13 each and used book for \$5 each. The gross profit on a new book is 30% of the cost. The gross profit on a used book is 100% of the cost. How much gross profit can the bookstore earn from a \$67 sale?

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Manager
Joined: 12 Apr 2006
Posts: 202
Location: India

### Show Tags

24 May 2009, 11:26
Sale on \$67 can be in this way

13 + 13 + 13 + 13 + 5 + 5 + 5 = 67

On \$13 sale bookstore earns \$3 gross profit (30% on cost) and on \$5 sale it earns \$2.5 (100% on cost).

So total profit comes to

3 + 3 + 3 + 3 + 2.5 + 2.5 + 2.5 = 19.5
Intern
Joined: 15 Feb 2009
Posts: 12

### Show Tags

24 May 2009, 14:26
humans wrote:
Sale on \$67 can be in this way

13 + 13 + 13 + 13 + 5 + 5 + 5 = 67

On \$13 sale bookstore earns \$3 gross profit (30% on cost) and on \$5 sale it earns \$2.5 (100% on cost).

So total profit comes to

3 + 3 + 3 + 3 + 2.5 + 2.5 + 2.5 = 19.5

hey,

how did u get what r in red?
Senior Manager
Joined: 08 Jan 2009
Posts: 310

### Show Tags

24 May 2009, 19:15
13 and 5 are prime number. By trail and error i got to 67.
Manager
Joined: 12 Apr 2006
Posts: 202
Location: India

### Show Tags

25 May 2009, 01:00
Quote:
hey,

how did u get what r in red?

I assumed couple of things in the question, which I am not sure if right way to do, but otherwise question was also not very clear in details.

As we know the total sale amount is 67 and it comprises \$13 and \$5 sale.

So I assumed it would comprise atleast one \$13 sale so 67-13 = 54 but this is not a multiple of 5 so there may be more than one sale of \$13. Tried 54-13 = 41 but this is again not a multiple of 5 so keep on doing this until I get the number which is multiple of 5, which became the number of sales of \$5.

Hope this clarifies.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: gross profit &nbs [#permalink] 25 May 2009, 01:00
Display posts from previous: Sort by

# Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.