instruction:
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.
question:
Problem: a worker earns $ 20 on the first day and spends $ 15 on the second day. the worker earns $ 20 on the third day and spends $ 15 on the fourth day. if this pattern continues, on which day will the worker first reach a net total of $ 80 ?
Options: a. 24, b. 25, c. 27, d. 30, e. 32
answer:
b


question:
Problem: cereal a is 10 % sugar by weight, whereas healthier but less delicious cereal b is 2 % sugar by weight. to make a delicious and healthy mixture that is 3 % sugar, what should be the ratio of cereal a to cereal b, by weight ?
Options: a. 2: 9, b. 2: 7, c. 1: 7, d. 1: 4, e. 1: 3
answer:
c


question:
Problem: at joel ’ s bookstore, the current inventory is 30 % historical fiction. of the historical fiction books, 40 % are new releases, while 50 % of the other books are new releases. what fraction of all new releases are the historical fiction new releases ?
Options: a. 4 / 25, b. 12 / 47, c. 2 / 5, d. 8 / 15, e. 2 / 3
answer:

b