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: 3 pumps, working 8 hours a day, can empty a tank in 2 days. how many hours a day must 15 pumps work to empty the tank in 1 day ?
Options: a. 3.5, b. 4.8, c. 5.1, d. 5.2, e. 6.3
Solution:
a