1.
Dave, Shareem, Li, and Katlin are deciding which two players will play the first game of checkers. They put their names into a hat and pull out two at random. How many outcomes are in the sample space?
A.
3
B.
6
C.
4
D.
2
Hint
2.
Ben, Jenny, Angela, and Craig all ran in the 1-mile cross-country race. What is the probability that Craig finished ahead of Ben?
A.
+
B.
C.
D.
Hint
3.
All whole-number pairs with a sum of 30 are placed into a hat. How many pairs are there?
A.
16
B.
12
C.
15
D.
30
Hint
4.
All whole-number pairs with a sum of 30 are placed into a hat. What is the probability that one of the numbers in the pair selected is greater than 20?
A.
B.
C.
D.
Hint
5.
If the mean of three numbers is 4, what is their sum?
A.
7
B.
27
C.
64
D.
12
Hint