Permutations
posted by Chloé on .
1. 4!
a.) 3
b.) 6
c.) 12
d.) 24******
2. 5!
a.) 25********
b.) 120
c.) 250
d.) 625
5. Five friends are having their picture taken. How many ways can the photographer arrange the friends in a row?
a.) 150
b.) 100
c.) 120*******
d.) 80
6. How would you apply the fundamental counting principle to a bike lock combination with 5 numbers?
a.) 10 + 10 + 10 + 10 + 10
b.) 10 × 5
c.) 10 × 10 × 10 × 10 × 10*******
d.) none of these

Odd. you got 4! correct, but think 5! is 5^2?
And then you got #5 correct, too!
#6 ok as well.