

1. 
How many ways can 3 CDs be selected from a stack of 7 different CDs? 


A. 
6 
B. 
35 


C. 
5040 
D. 
245 


Hint 


2. 
A group of 10 students is to be divided into 2 groups of 5. How many ways is this possible? 


A. 
10 
B. 
252 


C. 
120 
D. 
30,240 


Hint 


3. 
You have tests coming up soon in all your classes. You have six schoolbooks that you could take home, but only room for four in your backpack. How many different combinations of schoolbooks can you take home in your backpack? 


A. 
24 
B. 
15 


C. 
30 
D. 
4 


Hint 


4. 
While at a local video rental store, 5 movies catch your eye, but you only want to rent 2. How many combinations are there? 


A. 
10 
B. 
2 


C. 
20 
D. 
5 


Hint 


5. 
Which situation is a permutation? 


A. 
The number of games it would take to start 5 different basketball players from a team of 10. 


B. 
The number of ways you can choose 3 hot dog toppings from a total of 5. 


C. 
The number of ways 8 students can finish first, second, or third place at the Math Olympiad. 


D. 
The number of ways each person can shake hands with the other 11 people in the room. 


Hint 


