1. Recall t he telemarketing campaign launched by the Wipe Your Feet carpet cleaning company described in Example 3.2.8. On the average, how many new cusrnmers would that c:ffurt iden tify? How 1lll111y calls would they have lo make in order to find an avet"age of 100 new customers?
2. A manufacturer has 100 memory chips in stock, 4% of which are likely to be defective (based on past experience ). A random sample of 20 chips is selected and shipped t o a factory that assembles laptops. Let X d enote the number of computers tha t receive faulty memory chips. Find E( X ).