Q: A museum has an average of 510 visitors on Sunday and 240 on other days. What is the average number of visitors per day in a month of 30 days beginning with a Sunday?  

Answer: B

The average number of visitors per day in a month of 30 days beginning with a Sunday is 285.
To find this, we can use the following steps:
There are 5 Sundays and 25 other days in a month of 30 days beginning with a Sunday.
The average number of visitors on Sunday is 510, and the average number of visitors on other days is 240.
Therefore, the total number of visitors in the month is 5 * 510 + 25 * 240 = 5250 + 6000 = 11250.
The total number of days in the month is 30.
Therefore, the average number of visitors per day in the month is 11250 / 30 = 285.

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