Problem 2.1: Calculate the following:
a) P(12, 7)
b) P(3, 2)
c) P(7, 4)
d) P(8, 8)
[Solution]

Problem 2.2: Calculate the following:
a) C(12, 7)
b) C(3, 2)
c) C(7, 4)
d) C(8, 8)
[Solution]

Problem 2.3: Andrew owns 11 shirts. In how many different ways can he dress in 7 days? [Solution]

Problem 2.4: Alexandra can bake 6 different types of cookies. She has to bring 4 different kinds to a bake sale. How many combinations can she bring? [Solution]

Problem 2.5: C(13, 5) = C(13, x). If x≠5, what is x? [Solution]