A library has an average of 510 visitors on Sundays and 240 on other days. What is the average number of visitors per day in a month of 30 days beginning with a Sunday?
Choose the correct option: A) 290 B) 304 C) 285 D) 270 E) 275

Rationale: "in a month of 30 days beginning with a sunday , there will be 4 complete weeks and another two days which will be sunday and monday . hence there will be 5 sundays and 25 other days in a month of 30 days beginning with a sunday average visitors on sundays = 510 total visitors of 5 sundays = 510 × 5 average visitors on other days = 240 total visitors of other 25 days = 240 × 25 total visitors = ( 510 × 5 ) + ( 240 × 25 ) total days = 30 average number of visitors per day = ( ( 510 × 5 ) + ( 240 × 25 ) ) / 30 = ( ( 51 × 5 ) + ( 24 × 25 ) ) / 3 = ( 17 × 5 ) + ( 8 × 25 ) = 85 + 200 = 285 answer is c ."
Answer: C