A public library has an average attendance of 410 on Sundays and 230 for the remaining days. The average attendance per day of a month of 30 days beginning with Sunday would be:

Since the month has 30 days and begins with a Sunday:
The Sundays fall on the 1st, 8th, 15th, 22nd, and 29th days.
So, there are exactly 5 Sundays in this month.

Number of remaining days = 30−5=25 days.

Now, calculate total attendance:

Total attendance on Sundays=5×410=2050
Total attendance on remaining days=25×230=5750
Total attendance for the month=2050+5750=7800
Calculate the average attendance per day:

Average per day=
Total Days
Total Attendance
​
=
30
7800
​
=260