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 choice from the following:  A) 290  B) 304  C) 285  D) 270  E) 275
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= 
<gadget id="calculator">85+200</gadget>
<output>285</output>
285   Answer is 285.
<result>C</result>
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?