# Question

According to the Internal Revenue Service, the mean tax refund for the year 2013 was $3,000. Assume the standard deviation is $450 and that the amounts refunded follow a normal probability distribution.

a. What percent of the refunds are more than $3,100?

b. What percent of the refunds are more than $3,100 but less than $3,500?

c. What percent of the refunds are more than $2,250 but less than $3,500?

a. What percent of the refunds are more than $3,100?

b. What percent of the refunds are more than $3,100 but less than $3,500?

c. What percent of the refunds are more than $2,250 but less than $3,500?

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