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word problem

by sud21 » Sun Jan 15, 2012 2:28 am
The sales price of a certain item is D, and the sales tax is P percent. If someone paid $20 for the item and got change of C, is the sales price greater than $15?
1). C<5
2). P=6
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Source: — Data Sufficiency |
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by rijul007 » Sun Jan 15, 2012 4:59 am
sud21 wrote:The sales price of a certain item is D, and the sales tax is P percent. If someone paid $20 for the item and got change of C, is the sales price greater than $15?
1). C<5
2). P=6
20 - D(1 + P/100) = C
Is D>15?


1). C<5
20 - D(1+P)/100 < 5
D(1+P)/100 > 15

Insufficient


2). P=6

20 - D(1 + P/100) = C
20 - D(106/100) = C
Insufficient


Combining the 2 statements
D(106/100)>15

Suff


Option C
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