

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


A. 
Each trial has exactly two outcomes. 


B. 
There must be a fixed number of trials. 


C. 
The outcomes of each trial must be dependent. 


D. 
The probabilities in each trial must be independent. 


Hint 


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


A. 

B. 



C. 

D. 



Hint 


3. 
Francis guesses at all 6 true/false questions in a trivia game. What is the probability that he guesses correctly on at least 5 of the questions? 


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. 
0.5 


C. 
0.53962 
D. 
0.54432 


Hint 


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


A. 
0.1319 
B. 
0.1106 


C. 
0.0962 
D. 
0.1748 


Hint 

