At the University of Notre Dame Mendoza College of Business, 40% of the students seeking a masters

Question:

At the University of Notre Dame Mendoza College of Business, 40% of the students seeking a master’s degree specialize in finance (Kiplinger’s Personal 0Finance, March
2009). Twenty master’s degree students are randomly selected.
a. What is the probability that exactly 10 of the students specialize in finance?
b. What is the probability that no more than 10 of the students specialize in finance?
c. What is the probability that at least 15 of the students specialize in finance?