In a concert hall, 16% of seats are in section A, 24% are in section B, 32% are in section C, and 28% are in section D. Section A seats sell for $35, section B for $30, section C for $25, and section D for $15. You see a ticket stuck high in a tree.
a. What is the expected value of the ticket?
b. The markings on the ticket look like either section A or C. If this is true, then what is the probability that the ticket is for section C?
c. If the ticket is for section A or C, then what is the expected value of the ticket?