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# If xerox paper costs 5 cents a sheet and a buyer gets 10%

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Intern
Joined: 25 Jan 2013
Posts: 24
If xerox paper costs 5 cents a sheet and a buyer gets 10% [#permalink]

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20 Feb 2013, 22:42
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Difficulty:

35% (medium)

Question Stats:

77% (02:06) correct 23% (02:50) wrong based on 106 sessions

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If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 2000 papers and 20% discount after first 10000 papers, how much will it cost to buy 25000 sheets of xerox paper?

A. $1250 B.$1060
C. $1350 D.$900
E. $1000 [Reveal] Spoiler: OA Manager Joined: 17 Oct 2012 Posts: 68 Location: India Concentration: Strategy, Finance WE: Information Technology (Computer Software) Re: If xerox paper costs 5 cents a sheet and a buyer gets 10% [#permalink] ### Show Tags 21 Feb 2013, 00:45 For first 2000 pages - cost 5 cents/paper For 2001 - 10000 - cost 4.5 cents/paper For 10000+ - 4cents/paper So Cost = (5 cents * 2000 ) + (4.5 cents * 8000 ) + (4 cents * 15000) =$1060
alternatively, (0.05 x 2000)+(0.045x8000)+(0.04x15000) = 1,060

Hope it is clear.
Director
Status: Done with formalities.. and back..
Joined: 15 Sep 2012
Posts: 617
Location: India
Concentration: Strategy, General Management
Schools: Olin - Wash U - Class of 2015
WE: Information Technology (Computer Software)
Re: If xerox paper costs 5 cents a sheet and a buyer gets 10% [#permalink]

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21 Feb 2013, 00:46
4
KUDOS
antoxavier wrote:
If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 2000 papers and 20% discount after first 10000 papers, how much will it cost to buy 25000 sheets of xerox paper?

A. $1250 B.$1060
C. $1350 D.$900
E. $1000 30 sec approach - solve it using approximation 25000 sheet at full price, 5 cent = 1250 25000 sheet at max discount price, 4 cent = 1000 Your ans got to be between these two. Ans B it is. _________________ Lets Kudos!!! Black Friday Debrief SC Moderator Joined: 22 May 2016 Posts: 1566 If xerox paper costs 5 cents a sheet and a buyer gets 10% [#permalink] ### Show Tags 10 Jul 2017, 03:28 antoxavier wrote: If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 2000 papers and 20% discount after first 10000 papers, how much will it cost to buy 25000 sheets of xerox paper? A.$1250
B. $1060 C.$1350
D. $900 E.$1000

Another 30-second approach: move the decimal point on cents to the right two places. Move the decimal point on quantity to the left two places. Each move offsets the other.

1. First batch at cost 5 (no discount) * 20 = total cost of 100

2. Second batch at discount of .9*5 = 4.5 * 80.

$$\frac{9}{2}$$ * 80 = total cost of 360

3. Third batch at discount of .8*5 = 4.

4 * 150 = total cost of 600

4. 100 + 360 + 600 = 1060

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Re: If xerox paper costs 5 cents a sheet and a buyer gets 10% [#permalink]

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12 Jul 2017, 17:01
2
KUDOS
Expert's post
antoxavier wrote:
If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 2000 papers and 20% discount after first 10000 papers, how much will it cost to buy 25000 sheets of xerox paper?

A. $1250 B.$1060
C. $1350 D.$900
E. $1000 The first 2,000 sheets cost 2,000 x 5 = 10,000 cents = 100 dollars. The next 8,000 sheets cost 8,000 x 5 x 0.9 = 36,000 cents = 360 dollars. The last 15,000 sheets cost 15,000 x 5 x 0.8 = 60,000 cents = 600 dollars. Thus, the total for 25,000 sheets is 100 + 360 + 600 = 1,060 dollars. Answer: B _________________ Scott Woodbury-Stewart Founder and CEO GMAT Quant Self-Study Course 500+ lessons 3000+ practice problems 800+ HD solutions EMPOWERgmat Instructor Status: GMAT Assassin/Co-Founder Affiliations: EMPOWERgmat Joined: 19 Dec 2014 Posts: 11513 Location: United States (CA) GMAT 1: 800 Q51 V49 GRE 1: 340 Q170 V170 Re: If xerox paper costs 5 cents a sheet and a buyer gets 10% [#permalink] ### Show Tags 05 Dec 2017, 12:50 1 This post received KUDOS Expert's post Hi All, To start, the GMAT almost always lists the answer choices 'in order' (often from least to greatest although sometimes in decreasing order). You can sometimes take strategic advantage of that information, so it's important to make sure that you're using practice questions that follow that design pattern. That all having been said, to answer this question, we need to break the calculation down in to 'pieces' (based on the cost/discount of each piece): The cost of the first 2,000 sheets The cost of the next 8,000 sheets The cost of the final 15,000 sheets At$0.05 per sheet, the first 2,000 sheets would cost (2,000)($0.05) =$100

Since a 10% discount is applied to the TOTAL cost of the next 8,000 sheets, that cost would be....
(8,000)($0.05) =$400 - (.1)($400) =$360

A 20% discount is applied to the TOTAL cost of the final 15,000 sheets....
(15,000)($0.05) =$750 - (.2)($750) =$600

Total Cost = $100 +$360 + $600 =$1060

[Reveal] Spoiler:
B

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Re: If xerox paper costs 5 cents a sheet and a buyer gets 10%   [#permalink] 05 Dec 2017, 12:50
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