Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Problem: a shopkeeper sold an article at $ 1170 and gained a 20 % profit. what was the cost price ?
Options: a. $ 950, b. $ 975, c. $ 1000, d. $ 1025, e. $ 1050
Student:
b