A library has an average of 510 visitors on Sunday 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 from the following options: A) 288 B) 278 C) 267 D) 285 E) 231
Since the month begins with a Sunday, so 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 Sunday and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is: