Discuss the below:
The Stripes C-store chain reports that 7% of its credit card holders will default within 5 years. It just mailed out 12 new cards today.
a. How many of these new cardholders would be expected to default within 5 years? What is the standard deviation?
b. What is the likelihood that none of these cardholders will default?
c. What is the likelihood that at least one will default?