A library has an average of 510 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:
Select the correct option.
A) 250  B) 276  C) 280  D) 285  E) 295
Explanation:   Since the month begins with a Sunday, to there will be five Sundays in the month.   Required average = (510 × 5 + 240 × 25/30)   = 8550/30= 
<gadget id="calculator">8550/30</gadget>
<output>285</output>
285   Answer: 285
<result>D</result>
A library has an average of 510 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: