The following table reports the U.S. credit card industry's market share data for 2011. A random sample of 100 credit card users is to be questioned regarding their satisfaction with their credit card company. For simplification, assume that each credit card user carries just one credit card and that the market share percentages are the percentages of all credit card customers that carry each brand.

a. For random samples of 100 credit card users, what is the expected number of customers who carry Visa? Discover?
b. What is the probability that half or more of the sample of credit card users carry Visa? American Express?

Transcribed Image Text:

Credit Carcd Visa MasterCard Discover American Express Market Share % 50