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

 It is currently 05 May 2015, 06:04

# Expecting Soon:

Wharton Round 3 Decisions.   |   Join Chat Room for Live Updates

### 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 merchant paid $300 for a shipment of x identical  Question banks Downloads My Bookmarks Reviews Important topics Author Message TAGS: Manager Joined: 14 Dec 2005 Posts: 76 Followers: 1 Kudos [?]: 0 [0], given: 0 A merchant paid$300 for a shipment of x identical [#permalink]  26 Feb 2006, 09:41
A merchant paid $300 for a shipment of x identical calculators. The merchant used 2 of the calculators as demonstrators and sold each of the others for$5 more than the average (arithmetic mean)
cost of the x calculators. If the total revenue from the sale of
the calculators was $120 more than the cost of the shipment, how many calculators were in the shipment? (A) 24 (B) 25 (C) 26 (D) 28 (E) 30 Intern Joined: 08 Jan 2006 Posts: 27 Followers: 0 Kudos [?]: 0 [0], given: 0 Re: Problem Solving Help [#permalink] 26 Feb 2006, 10:19 Avis wrote: A merchant paid$300 for a shipment of x identical calculators.
The merchant used 2 of the calculators as demonstrators and sold
each of the others for $5 more than the average (arithmetic mean) cost of the x calculators. If the total revenue from the sale of the calculators was$120 more than the cost of the shipment, how many
calculators were in the shipment?
(A) 24
(B) 25
(C) 26
(D) 28
(E) 30

E.

(300/x+5)(x-2) = 120+300

Try the easy one e) 30. ((300/30)+5)(30-2)=420
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5078
Location: Singapore
Followers: 22

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

Average cost of the x calculators = 300/x

Merchant sold (x-2) calculators at (300/x + 5) dollars

Profit

(x-2)(300/x + 5) - 300 = 120
(x-2)(300+5x)/x = 420
300x + 5x^2 - 600 - 10x = 420x
5x^2 -130x -600 = 0
x^2 - 26 - 120 = 0
(x-30)(x+4) = 0
x = 30

Ans E
Similar topics Replies Last post
Similar
Topics:
1 A merchant paid $300 for a shipment of x identical calculato 12 04 Apr 2011, 05:55 A merchant paid$300 for a shipment of x identical 3 22 Mar 2008, 14:52
A merchant paid $300 for a shipment of x identical 4 25 Apr 2006, 12:19 A merchant paid$300 for a shipment of x identical 1 06 Apr 2006, 18:50