Q: 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: a library has an average of 540 visitors on sundays and 240 on other days. the average number of visitors per day in a month of 30 days beginning with a sunday is :
Options: a. 300, b. 276, c. 290, d. 285, e. none
A:
c