The same number of 7th and 8th graders
attend Morgan's school. A student is
randomly chosen to raise the flag each day.
About how many times is it expected that a
7th grader will raise the flag during the next
30 days of school?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?