Best-Selling Albums. The International Federation of the Phonographic Industry (IFPI) provides data on the best-selling albums of the year. The top six best-selling albums of 2012 were by the artists Adele (A), Taylor Swift (T), One Direction (O), Lana Del Rey

(L), Pink (P), and Rod Stewart (R).

a. List the 15 possible samples (without replacement) of two artists that can be selected from the six. For brevity, use the initial provided.

b. Describe a procedure for taking a simple random sample of two artists from the six.

c. If a simple random sampling procedure is used to obtain two artists, what are the chances of selecting O and A? T and P?