Word Problem - Profit/Loss

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Word Problem - Profit/Loss

by sukhman » Fri Oct 18, 2013 10:00 pm
A trader marks his good at a certain percentage over his cost price and then gives 30% discount , thereby making 5 % profit. What is the mark up percentage ?
Last edited by sukhman on Fri Oct 18, 2013 10:52 pm, edited 1 time in total.
Source: — Problem Solving |

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by theCodeToGMAT » Fri Oct 18, 2013 10:20 pm
Sukman, it will be great if you post the answer choices; if you don't have answer choices then post OA.

Let CP = 100
Percentage = x%
Profit = 5

[ (100 + x) - 30( 100+x)/100 ] - 100 = 5

100(100+x) - 30(100+x) - 10000 = 500
10000 + 100x - 3000 - 30x - 10000 = 500
70x = 3500
x = 50
R A H U L

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by GMATGuruNY » Sat Oct 19, 2013 3:17 am
sukhman wrote:A trader marks his good at a certain percentage over his cost price and then gives 30% discount, thereby making 5% profit. What is the markup percentage ?

40
50
60
70
80
I've added answer choices, which the GMAT would provide.
Let the cost price = 100.
We can plug in the answer choices, which represent the required markup.

Answer choice C: 60
Regular selling price = cost price + markup = 100 + .6(100) = 160.
Price with a 30% discount = 160 - .3(160) = 112.
Resulting profit = (discounted price) - (cost price) = 112-100 = 12.
Profit percentage = profit/cost = 12/100 = 12%.
Too much profit.
To decrease the profit, the markup must be LOWER.
Eliminate C, D and E.

Answer choice B: 50
Regular selling price = cost price + markup = 100 + .5(100) = 150.
Price with a 30% discount = 150 - .3(150) = 105.
Resulting profit = (discounted price) - (cost price) = 105-100 = 5.
Profit percentage = profit/cost = 5/100 = 5%.
Success!

The correct answer is B.
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