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 store reported total sales of $ 460 million for february of this year. if the total sales for the same month last year was $ 320 million, approximately what was the percent increase in sales ?
Options: a. 2 %, b. 17 %, c. 44 %, d. 65 %, e. 83 %
answer:
c

question:
Problem: a train 510 m long is running at a speed of 45 km / hr. in what time will it pass a bridge 140 m long ?
Options: a. 40, b. 52, c. 26, d. 21, e. 14
answer:
b

question:
Problem: at a monthly meeting, 3 / 5 of the attendees were males and 7 / 8 of the male attendees arrived on time. if 4 / 5 of the female attendees arrived on time, what fraction of the attendees at the monthly meeting did not arrive on time ?
Options: a. 47 / 200, b. 31 / 200, c. 17 / 100, d. 11 / 100, e. 7 / 50
answer:
b