**Problem : **
Calculate the following:

a)
*P*(12, 7)

b)
*P*(3, 2)

c)
*P*(7, 4)

d)
*P*(8, 8)

b) 6

c) 840

d) 40320

**Problem : **
Calculate the following:

a)
*C*(12, 7)

b)
*C*(3, 2)

c)
*C*(7, 4)

d)
*C*(8, 8)

b) 3

c) 35

d) 1

**Problem : **
Andrew owns 11 shirts. In how many different ways can he dress in 7 days?

**Problem : **
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?

**Problem : **
*C*(13, 5) = *C*(13, *x*)
. If
*x*≠5
, what is
*x*
?