

1. 
Which statement is not true for a binomial experiment? 


A. 
The outcomes of each trial must be dependent. 


B. 
The probabilities in each trial must be independent. 


C. 
Each trial has exactly two outcomes. 


D. 
There must be a fixed number of trials. 


Hint 


2. 
The probability of tossing a head on a bent coin is 25%. Find the probability of getting 3 heads if the coin is tossed three times. 


A. 

B. 



C. 

D. 



Hint 


3. 
Determine the probability of getting exactly 2 heads if 4 fair coins are tossed. 


A. 

B. 



C. 

D. 



Hint 


4. 
Kevin has an email account and checks his email several times per day. The probability of Kevin receiving an email from his friends is . Suppose he checks his email 6 times in a day. Find the probability that Kevin gets a message at least 4 of the times he checks his email throughout the day. 


A. 
0.4996 
B. 
0.53962 


C. 
0.54432 
D. 
0.5 


Hint 


5. 
A number cube is tossed four times. Find the probability that at least two 6s are tossed. 


A. 
0.0962 
B. 
0.1319 


C. 
0.1106 
D. 
0.1748 


Hint 

