a library has an average of 660 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 :
"since the month begins with sunday , to there will be five sundays in the month average required = ( 660 x 5 + 240 x 25 ) / 30 ) = 310 answer : option d"
divide(add(multiply(add(floor(divide(30, add(const_3, const_4))), const_1), 660), multiply(subtract(30, add(floor(divide(30, add(const_3, const_4))), const_1)), 240)), 30)