What are deviational variables? how do they differ from decision variables in traditional lp problems? be detailed.

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.

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

Can someone, me with this.i really need with this