among 15 metal parts produced in a machine shop, 3 are defective. if a random sample of 6 of these metal parts is selected, find: using the binom.dist formula number of parts number of devective sample size 15 3 6 required: a) the probability that this sample will contain at least two defectives. 0.340659341 b) the probability that this sample will contain at most one defective. 0.659340659