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: the sum of 4 consecutive even numbers is 140. what would be the smallest number ?
Options: a. 32, b. 88, c. 70, d. 123, e. 12

SOLUTION: a

PROBLEM: Problem: in a certain production lot, 40 percent of the toys are red and the remaining toys are green. half of toys are small and half are large. if 10 percent of the toys are red and small, and 40 toys are green and large. how many of the toys are red and large ?
Options: a. 40, b. 60, c. 70, d. 80, e. 90

SOLUTION:
b