TASK DEFINITION: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
PROBLEM: Problem: if a / b = 4 / 3, then ( 3 a + 2 b. / ( 3 a - 2 b. = ?
Options: a. 6, b. 3, c. 5, d. - 1, e. none

SOLUTION: b

PROBLEM: Problem: if the simple interest on a certain amount in at 4 % rate 5 years amounted to rs. 2240 less than the principal. what was the principal ?
Options: a. 1500, b. 2500, c. 2507, d. 2800, e. 11500

SOLUTION: d

PROBLEM: Problem: the mass of 1 cubic meter of a substance is 500 kilograms under certain conditions. what is the volume, in cubic centimeters, of 1 gram of this substance under these conditions ? ( 1 kilogram = 1,000 grams and 1 cubic meter = 1, 000,000 cubic centimeters )
Options: a. 0.8, b. 1.25, c. 2.0, d. 2.5, e. 80.0

SOLUTION:
c