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:
Choose the correct choice:	A) 250	B) 276	C) 280	D) 285	E) None of these
Explanation:   Since the month begins with a Sunday, to there will be five Sundays in the month.   Required average   = {510 x 5 + 240 x 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: