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: the purchase price of an article is $ 48. in order to include 5 % of cost for overhead and to provide $ 12 of net profit, the markup should be
Options: a. 15 %, b. 25 %, c. 30 %, d. 40 %, e. 45 %
answer:
c


question:
Problem: in one alloy there is 10 % chromium while in another alloy it is 6 %. 15 kg of the first alloy was melted together with 35 kg of the second one to form a third alloy. find the percentage of chromium in the new alloy.
Options: a. 7.2 %, b. 9 %, c. 9.2 %, d. 8.6 %, e. 8.4 %
answer:
a


question:
Problem: a train travels from new york to chicago, a distance of approximately 270 miles, at an average rate of 30 miles per hour and arrives in chicago at 6: 00 in evening, chicago time. at what hour in the morning, new york time, did the train depart for chicago ? ( note: chicago time is one hour earlier than new york time.
Options: a. 3: 00, b. 4: 00, c. 10: 00, d. 6: 00, e. 7: 00
answer:

c