Detailed Instructions: 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 invested $ 100 in a business after 6 months b invested $ 200 in the business. end of the year if they got $ 100 as profit. find a shares ?
Options: a. $ 100, b. $ 75, c. $ 20, d. $ 120, e. $ 50
Solution:
e