1.  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 :
A. 250
B. 276
C. 280
D. 285

Answer: Option D

Explanation:

Since the month begins with a Sunday, so there will be five Sundays in the month.

 Required average :

=   510 x 5 + 240 x 25 = 8550 = 285.
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