Problema GMAT Quant 04/07/14 (PS) (600-700)

[Recobita]

Quant (Problem Solving) (600-700)

Sarah paid a sales tax of 8 percent on her purchase. If the sales tax had been only 5 percent, she would have paid $12 less in sales tax on her purchase. What was the total amount that Sarah paid for her purchase including sales tax?

(A) $368
(B) $380
(C) $400
(D) $420
(E) $432

[Recobita]

Quant (Problem Solving) (600-700)

Sarah paid a sales tax of 8 percent on her purchase. If the sales tax had been only 5 percent, she would have paid $12 less in sales tax on her purchase. What was the total amount that Sarah paid for her purchase including sales tax?

(A) $368
(B) $380
(C) $400
(D) $420
(E) $432

Solución propuesta:

respuesta: show

(1,08 * X)-(1,05 * X) = 12; X = 400; 1,08X = 432

La respuesta correcta es (E)