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09 Aug 2019, 01:05
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91% (01:03) correct 9% (01:53) wrong based on 56 sessions

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If a discount of 20% off the retail price of a desk saves Mark $45, how much did he pay for the desk? A.$145
B. $160 C.$180
D. $210 E.$215

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10 Aug 2019, 01:42
Bunuel wrote:
If a discount of 20% off the retail price of a desk saves Mark $45, how much did he pay for the desk? A.$145
B. $160 C.$180
D. $210 E.$215

given
retail price - discount price = 45
let retail price = x
so discount price ; x*.8
solve for x ; x-.8x = 45 ; x= 225
so 20% discount ; 225*.8 ; 180
IMO C
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Re: If a discount of 20% off the retail price of a desk saves Mark $45, ho [#permalink] ### Show Tags 10 Aug 2019, 23:41 Using ratio and proportion. 20%(discount on cost of desk):$45
80%(amount paid for the desk):y
y=80*45/20 = $180 Hence C. Manager Joined: 29 May 2016 Posts: 110 Location: Czech Republic Concentration: Finance, Strategy GMAT 1: 700 Q47 V38 GPA: 3.94 WE: Corporate Finance (Investment Banking) Re: If a discount of 20% off the retail price of a desk saves Mark$45, ho  [#permalink]

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10 Aug 2019, 23:59
1
Even though answers were already provided, I find this solution easier. Hope it helps.

Given 20% = 45 (discount)
Thus 100% = 225 (original price)

How much paid? = original price - discount
180 = 225 - 45
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Re: If a discount of 20% off the retail price of a desk saves Mark $45, ho [#permalink] ### Show Tags 12 Aug 2019, 18:16 Bunuel wrote: If a discount of 20% off the retail price of a desk saves Mark$45, how much did he pay for the desk?

A. $145 B.$160
C. $180 D.$210
E. $215 We can let n = the retail price of the desk and create the equation: 0.8n = n - 45 45 = 0.2n 225 = n So he paid 0.8 x 225 = 180 dollars. Answer: C _________________ # Scott Woodbury-Stewart Founder and CEO Scott@TargetTestPrep.com 202 Reviews 5-star rated online GMAT quant self study course See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews If you find one of my posts helpful, please take a moment to click on the "Kudos" button. CEO Joined: 03 Jun 2019 Posts: 2921 Location: India GMAT 1: 690 Q50 V34 WE: Engineering (Transportation) Re: If a discount of 20% off the retail price of a desk saves Mark$45, ho  [#permalink]

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12 Aug 2019, 18:18
Bunuel wrote:
If a discount of 20% off the retail price of a desk saves Mark $45, how much did he pay for the desk? A.$145
B. $160 C.$180
D. $210 E.$215

20% x = 45
80% x = 180

IMO C

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