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: a goods train runs at the speed of 72 kmph and crosses a 250 m long platform in 24 seconds. what is the length of the goods train ?
Options: a. 230 m, b. 240 m, c. 260 m, d. 270 m, e. none of these

SOLUTION: a

PROBLEM: Problem: if a mixture is 1 ⁄ 7 alcohol by volume and 2 ⁄ 7 water by volume, what is the ratio of the volume of alcohol to the volume of water in this mixture ?
Options: a. 4 / 2, b. 3 / 2, c. 1 / 2, d. 5 / 2, e. 7 / 2

SOLUTION: c

PROBLEM: Problem: a person borrows 9000 for 9 years at 3 % p. a. simple interest. he immediately lends it to another person at 7 % p. a. for 9 years. find his gain in the transaction per year.
Options: a. 380, b. 360, c. 340, d. 300, e. 180

SOLUTION:
b