Source: Official Guide for GMAT Review 2016 Data Sufficiency ; #40

1

By what percentage was the price of a

By what percentage was the price of a certain television set discounted for a sale?

1 Explanation

1

Danny Watts Jr

Statement 1: can be re-written as P = 1.25(D) or P = 5/4(D). We want to isolate D, so multiply both sides by 4/5. The resulting equation is 4/5(P) = D. This signifies that the discounted price is 80% of the original price, so the original price must have been discounted by 20%. SUFFICIENT.

Statement 2: D = P - 60. Since we have no ratio info regarding the original price relative to the discounted price, we are unable to solve. NOT SUFFICIENT.

Answer = A

Jan 13, 2018 • Comment

David Recine, Magoosh Tutor

You are knocking these out of the park this week, Daniel!

Jan 15, 2018 • Reply

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Official GMAT Material

Official Guide for GMAT Review 2016

Official Guide for the GMAT 13th Ed.

Official Guide for the GMAT 2015 14th Ed.

Official Guide for the GMAT 12th Ed.

Revised GRE PDF 2nd Ed.


Section 6.3 Data Sufficiency

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