In the past 4 months, Collin has lost 8 pounds, gained 9 pounds, lost 3 pounds, and lost another 5 pounds. Find his total change in weight.

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.