Can you help with this DS question?- Thanks in advance!

This topic has expert replies
User avatar
Senior | Next Rank: 100 Posts
Posts: 64
Joined: Mon Jul 23, 2012 1:59 pm
Thanked: 1 times
Stores L and M each sell a certain product at a different regular price. If both stores discount their regular price of the product, is the discount price at Store M less than the discount price at Store L ?

(1) At Store L the discount price is 10 percent less than the regular price; at Store M the discount price is 15 percent less than the regular price.
(2) At Store L the discount price is $5 less than the regular store price; at Store M the discount price is $6 less than the regular price.
Source: — Problem Solving |

Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Sun May 13, 2012 6:01 am

by iamsaipavan » Tue Aug 06, 2013 8:19 pm
I think the answer is C. We need both statements to answer this question. The $5 is 10% of original price of L and $6 is 15% of original price of M. After finding the original prices we can check which discounted price is less.

User avatar
Senior | Next Rank: 100 Posts
Posts: 64
Joined: Mon Jul 23, 2012 1:59 pm
Thanked: 1 times

by yumi2012 » Tue Aug 06, 2013 8:25 pm
Then how can we find the two different original prices? There's no way to figure out which discount price is less without knowing their original prices

GMAT/MBA Expert

User avatar
Elite Legendary Member
Posts: 10392
Joined: Sun Jun 23, 2013 6:38 pm
Location: Palo Alto, CA
Thanked: 2867 times
Followed by:511 members
GMAT Score:800

by [email protected] » Tue Aug 06, 2013 9:45 pm
Hi Yumi,

With BOTH FACTS combined, we know that....

Store L: the $5 discount = 10% of the original price, so the original price = $50
The math:
5 = .1X
50 = X

Store M: the $6 discount = 15% of the original price, so the original price = $40
The math:
6 = .15Y
600 = 15Y
40 = Y

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image