Question: RETAIL SALES The probability that a shopper in a certain boutique will buy a blouse is .35, that she will buy a pair of pants is .30 and that she will buy a skirt is .27. The probability that she will buy both a blouse and a skirt is .15, that she will buy both a skirt and a pair of pants is .19, and that she will buy both a blouse and a pair of pants is .12. Finally, the probability that she will buy all three items is .08. What is the probability that a customer will buy
a. Exactly one of these items?
b. None of these items?