1. Determine the probability, using binomial distribution, of obtaining 4 or more nonconforming units when sampling 30 computers from batch known to be 10% nonconforming.
2. Injection molding machine produces golf tees which are 20.0% nonconforming. Using normal distribution as approximation to binomial, determine the probability that, in the random sample of 360 golf tees, 40 or less are nonconforming.