A delivery truck is transporting boxes of two sizes: large and small. The large boxes welgh 55 pounds each, and the small boxes weigh 15 pounds each. There are 125 boxes in all. If the truck is carrying a total of 4275 pounds in boxes, how many of each type of box is it carrying?

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?