a major clothing store compared the sales of a new line and of a no longer fashionable line of women's sportswear. The store found that 75% of all sales made to credit card users were for purchases of the new line of sportswear, while 30% of all sportswear sales were for the purchase of the outdated fashions. Records indicate that credit cads are used in 80% of all sales. If a customer selects an item from the new line of sportswear, what is the probability that she will use a credit card?