Nine percent of undergraduate students carry credit card balances greater than $7,000. Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage.
a) What is the probability that two of the students will have a balance greater than $7,000?
b) What is the probability that none will have a balance greater than $7,000?
c) What is the probability that at least three will have a balance greater than $7,000?