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In a certain store, item X sells for 10 percent less than it

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In a certain store, item X sells for 10 percent less than it

by GMATinsight » Thu Oct 08, 2015 1:15 am
In a certain store, item X sells for 10 percent less than item Y. What is the ratio of the store's revenue from the sales of item X to that from the sales of item Y?

(1) The store sells 20 percent more units of item Y than of item X.
(2) The store's revenue from the sales of item X is $6,000 and from the sales of item Y is $8,000.

Answer: option D
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Source: — Data Sufficiency |
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by GMATinsight » Thu Oct 08, 2015 1:16 am
GMATinsight wrote:In a certain store, item X sells for 10 percent less than item Y. What is the ratio of the store's revenue from the sales of item X to that from the sales of item Y?

(1) The store sells 20 percent more units of item Y than of item X.
(2) The store's revenue from the sales of item X is $6,000 and from the sales of item Y is $8,000.

Answer: option D
Solution is right here


If X and Y are the No. of items sold of X and Y, Then
X = 0.9Y
Let, Price of each item of X = a
and Price of each item of Y = b
Revenue of X = aX
Revenue of Y = bY

Question : aX : bY = ? but since X/Y=0.9 so the question is a:b = ?

Statement 1: b = 1.2a
i.e. a/b = 5/6
SUFFICIENT

Statement 2: aX = 6000 and bY = 8000
i.e. aX/bY = 6000/8000
SUFFICIENT

Answer: option D
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