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3. A marketing rm nds that 16% of advertising contacts result in a purchase. Four customers are randomly selected and are emailed an advertisement. Use Binomiai FORMULA twice a. What is the probability that no more than one customer makes a purchase? b. What is the E00? 4. A recent study revealed that 60% of business travelers make their own travel arrangements. The study is to be replicated with a sample of 12 frequent business travelers. Use Binomial TABLE a. What is the probability exactly 4 travelers make their own travel arrangements? b. What is the probability 3 or fewer travelers make their own travel arrangements? 0. Calculate the expected value AND the standard deviation