# Permutations

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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

• Permutations -

Odd. you got 4! correct, but think 5! is 5^2?

And then you got #5 correct, too!

#6 ok as well.

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