Assume that in the long run 20% of all items coming off assembly line are defective. Assume that random sample of 8 items is chosen from all the items coming off the line. Let x denote how many of the 8 are defective.
a) Determine the possible values for x?
b) Calculate the probability that exactly 3 of the 8 are defective.
c) Determine the average or mean number of defectives in the 8?