Ken wants to buy two shirts the original price of the brochure is $34 and the original price of the second shirt is $28 candle use one of the two discount coupons shown to buy the shirt based on this information which statement is true

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?