Bunuel wrote:
A dealer sold good for $X. If Y percent was deducted for taxes and then $Z dollars was deducted for the cost of good, what was dealer’s gross profit after the deductions?
(1) X − Z = 400
(2) XY = 1100
Gross profit : x - y% - z.
Statement 1: No information about y%. Not sufficient.
Statement 2; No information about z. NOT sufficient.
Combining :
x - z = 400 . if we deduct y from 400 we we will get gross profit. Statement 2 gives the value of y%.
xy = 1100
x * y/100 = 1100 /100
xY% = 11.
x - z = 400
x - z - y% = 400 - 11 = 389.
The best answer is C.
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76% (01:34) correct 
