You are given a mathematical question described with an open-ended vocabulary. Questions in this task involve real-world situations, describing a mathematical problem. You are also given 4 or 5 answer options (associated with "A", "B", "C", "D", "E"). Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. LaTeX mathematical format (the standard way to express mathematical expressions in the typesetting software known as LaTeX) is used to express equations. Each question is solvable with high school math knowledge. Give only one answer for each question.
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Question: A bag contains 228 marbles, and one marble is selected at random. The probability of selecting a black marble is \(\frac { 5 } { 19 } \), and the probability of selecting a gold marble is \(\frac { 3 } { 38 } \). How many marbles in the bag are neither black nor gold?
(A)60 (B)78 (C)138 (D)150 (E)168

Answer: D


Question: At Music Outlet the regular price for a CD is \(d\) dollars. How many CDs can be purchased for m dollars when the CDs are on sale at 50\% off the regular price?
(A)\(\frac { m } { 50d } \) (B)\(\frac { md } { 50 } \) (C)\(\frac { md } { 2 } \) (D)\(\frac { m } { 2d } \) (E)\(\frac { 2m } { d } \)

Answer: E


Question: If Jorge earns $2,000 a month and spends $600 a month on rent, what percent of Jorge's monthly earnings does he spend on rent?
(A)25\% (B)30\% (C)35\% (D)40\% (E)45\%

Answer:
B