1. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 25%. If 16 calculators are selected at random, what is the probability that less than 7 of the calculators will be defective?
2. If x is a binomial random variable where n = 100 and p = .1, find the probability that x is less than or equal to 8 using the normal approximation to the binomial.