

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


A. 
Each trial has exactly two outcomes. 


B. 
The outcomes of each trial must be dependent. 


C. 
The probabilities in each trial must be independent. 


D. 
There must be a fixed number of trials. 


Hint 


2. 
A number cube is tossed four times. Find the probability that at least two 6s are tossed. 


A. 
0.1319 
B. 
0.1106 


C. 
0.1748 
D. 
0.0962 


Hint 


3. 
The probability of tossing a tail on a bent coin is . The coin is tossed 5 times. Find the probability of tossing exactly 3 tails. 


A. 
0.3292 
B. 
0.2906 


C. 
0.3028 
D. 
0.3114 


Hint 


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


A. 
0.1353 
B. 
0.1528 


C. 
0.1445 
D. 
0.1618 


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. 
0.2013 
B. 
0.1556 


C. 
0.1843 
D. 
0.1124 


Hint 

