

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


A. 
The probabilities in each trial must be independent. 


B. 
Each trial has exactly two outcomes. 


C. 
There must be a fixed number of trials. 


D. 
The outcomes of each trial must be dependent. 


Hint 


2. 
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 


3. 
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. 
0.53962 
B. 
0.54432 


C. 
0.5 
D. 
0.4996 


Hint 


4. 
Eric guesses at all 8 questions on a true/false test. Find the probability that he got at least 6 correct. 


A. 
0.1618 
B. 
0.1445 


C. 
0.1528 
D. 
0.1353 


Hint 


5. 
Kathy guesses at all of the 10 questions on a multiple choice exam. Find the probability that she gets 3 questions correct if each question has 5 choices. 


A. 
0.1843 
B. 
0.1556 


C. 
0.1124 
D. 
0.2013 


Hint 

