Name: 
 

Theoretical Probability



 1 

If the probability of a spinner landing on red in a game is mc001-1.jpg, what is the probability of it not landing on red?
a)
20%
c)
50%
b)
25%
d)
80%
 

 2 

Which event is certain to happen?
a)
Everyone walking into a room will have red hair.
c)
The Yankees baseball team will win the World Series.
b)
All babies born in June will be males.
d)
The Sun will rise in the east.
 

 3 

The faces of a cube are numbered from 1 to 6.  If the cube is rolled once, which outcome is least likely to occur?
a)
rolling an odd number
c)
rolling a number less than 6
b)
rolling an even number
d)
rolling a number greater than 4
 

 4 

Maria has a set of 10 index cards labeled with the digits 0 through 9.  She puts them in a bag and selects one at random.  The outcome that is most likely to occur is selecting
a)
an odd number
c)
a number that is at most 5
b)
a prime number
d)
a number that is divisible by 3
 

 5 

Which event has a probability of zero?
a)
choosing a letter from the alphabet that has line symmetry
c)
choosing a pair of parallel lines that have unequal slopes
b)
choosing a number that is greater than 6 and is even
d)
choosing a triangle that is both isosceles and right
 



 
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