1. A fair coin is flipped 9 times. What is the probability of getting exactly 6 heads? A fair coin means it has a 50% chance of landing heads up and a 50% chance of landing tails up 2. You flip a coin three times. (a) What is the probability of getting heads on only one of your flips? (b) What is the probability of getting heads on at least one flip? 3. A jar contains 10 blue marbles, 5 red marbles, 4 green marbles, and 1 yellow marble. Two marbles are chosen (without replacement). (a) What is the probability that one will be green and the other red? (b) What is the probability that one will be blue and the other yellow? 4. A refrigerator contains 6 apples, 5 oranges, 10 bananas, 3 pears, 7 peaches, 11 plums, and 2 mangos. a. Imagine you stick your hand in this refrigerator and pull out a piece of fruit at random. What is the probability that you will pull out a pear? b. Imagine now that you put your hand in the refrigerator and pull out a piece of fruit. You decide you do not want to eat that fruit so you put it back into the refrigerator and pull out another piece of fruit. What is the probability that the first piece of fruit you pull out is a banana and the second piece you pull out is an apple? c. What is the probability that you stick your hand in the refrigerator one time and pull out a mango or an orange? 5. Roll two fair dice. Each die has six faces. a. List the sample space. b. Let A be the event that either a three or four is rolled first, followed by an even number. Find P(A). c. Let B be the event that the sum of the two rolls is at most seven. Find P(B). d. In words, explain what “P(A|B)” represents. Find P(A|B). e. Are A and B mutually exclusive events? Explain your answer in one to three complete sentences, including numerical justification. f. Are A and B independent events? Explain your answer in one to three complete sentences, including numerical justification. 6. At a college, 72% of courses have final exams and 46% of courses require research papers. Suppose that 32% of courses have a research paper and a final exam. Let F be the event that a course has a final exam. Let R be the event that a course requires a research paper. a. Find the probability that a course has a final exam or a research project. b. Find the probability that a course has NEITHER of these two requirements. 7. Table 3.22 identifies a group of children by one of four hair colors, and by type of hair. a. Complete the table. b. What is the probability that a randomly selected child will have wavy hair? c. What is the probability that a randomly selected child will have either brown or blond hair? d. What is the probability that a randomly selected child will have wavy brown hair? e. What is the probability that a randomly selected child will have red hair, given that he or she has straight hair? f. If B is the event of a child having brown hair, find the probability of the complement of B. g. In words, what does the complement of B represent? 8. You ...

1. 1. A fair coin is flipped 9 times. What is the probability of
getting exactly 6 heads?
A fair coin means it has a 50% chance of landing heads up and a
50% chance of landing tails up
2. You flip a coin three times. (a) What is the probability of
getting heads on only one of your flips? (b) What is the
probability of getting heads on at least one flip?
3. A jar contains 10 blue marbles, 5 red marbles, 4 green
marbles, and 1 yellow marble. Two marbles are chosen (without
replacement). (a) What is the probability that one will be green
and the other red? (b) What is the probability that one will be
blue and the other yellow?
4. A refrigerator contains 6 apples, 5 oranges, 10 bananas, 3
pears, 7 peaches, 11 plums, and 2 mangos.
a. Imagine you stick your hand in this refrigerator and pull out a
piece of fruit at random. What is the probability that you will
pull out a pear?
b. Imagine now that you put your hand in the refrigerator and
pull out a piece of fruit. You decide you do not want to eat that
fruit so you put it back into the refrigerator and pull out another
piece of fruit. What is the probability that the first piece of fruit
you pull out is a banana and the second piece you pull out is an
apple?
c. What is the probability that you stick your hand in the
refrigerator one time and pull out a mango or an orange?
5. Roll two fair dice. Each die has six faces.
a. List the sample space.
b. Let A be the event that either a three or four is rolled first,
followed by an even number. Find P(A).
c. Let B be the event that the sum of the two rolls is at most
seven. Find P(B).
d. In words, explain what “P(A|B)” represents. Find P(A|B).
e. Are A and B mutually exclusive events? Explain your answer
in one to three complete sentences, including numerical

2. justification.
f. Are A and B independent events? Explain your answer in one
to three complete sentences, including numerical justification.
6. At a college, 72% of courses have final exams and 46% of
courses require research papers. Suppose that 32% of courses
have a research paper and a final exam. Let F be the event that a
course has a final exam. Let R be the event that a course
requires a research paper.
a. Find the probability that a course has a final exam or a
research project.
b. Find the probability that a course has NEITHER of these two
requirements.
7. Table 3.22 identifies a group of children by one of four hair
colors, and by type of hair.
a. Complete the table.
b. What is the probability that a randomly selected child will
have wavy hair?
c. What is the probability that a randomly selected child will
have either brown or blond hair?
d. What is the probability that a randomly selected child will
have wavy brown hair?
e. What is the probability that a randomly selected child will
have red hair, given that he or she has straight hair?
f. If B is the event of a child having brown hair, find the
probability of the complement of B.
g. In words, what does the complement of B represent?
8. You buy a lottery ticket to a lottery that costs $10 per ticket.
There are only 100 tickets available to be sold in this lottery. In
this lottery there are one $500 prize, two $100 prizes, and four
$25 prizes. Find your expected gain or loss.
9. Florida State University has 14 statistics classes scheduled
for its Summer 2013 term. One class has space available for
30 students, eight classes have space for 60 students, one class

3. has space for 70 students, and four classes have space for 100
students.
a. What is the average class size assuming each class is filled to
capacity?
b. Space is available for 980 students. Suppose that each class
is filled to capacity and select a statistics student at random. Let
the random variable X equal the size of the student’s class.
Define the PDF for X
c. Find the mean of X.
d. Find the standard deviation of X.
10. A school newspaper reporter decides to randomly survey 12
students to see if they will attend Tet (Vietnamese New Year)
festivities this year. Based on past years, she knows that 18% of
students attend Tet festivities. We are interested in the number
of students who will attend the festivities.
a. In words, define the random variable X.
b. List the values that X may take on.
c. Give the distribution of X. X ~ _____(_____,_____)
d. How many of the 12 students do we expect to attend the
festivities?
e. Find the probability that at most four students will attend.
f. Find the probability that more than two students will attend.
Multiplication and Division
Question One
4x12=??
48
24
18
44

4. That’s Right!!
Click next to continue
NEXT QUESTION
Remember to think of the problem like addition
12+12+12+12= 48
Lets try another one!
Let’s try again
What is 5x9?
A.35
B.40
C.45
D.50
That’s Right!!
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NEXTQuestion 2
That’s Not quite right
Why don’t you take a few moments and REVIEW the steps of

5. multiplying on the website? Then come and give it another go?
Can’t wait to see you soon!
EXIT GAME
NEXT QUESTION
Question 2
If Captain Bill has 9 crew members on his ship. He found a
treasure of 180 gold coins and wants to give each pirate the
same amount of gold coins. How many coins will each of
Captain Bill’s crew member get?
18
20
15
22
That’s Right!!
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NEXT
Oops! Captain Bill did NOT divide the coins correctly.
Lets help him out
He needs to think of it like 180/9
So if each crew member gets 20 coins ( 20x9) then he can give
all 180 coins away.
Lets try another one

6. Captain bill wants to give each of his friends a pear for being
so great. He decided to give 3 pearls to 15 different friends.
How many total pearls will he need?
35
45
30
40
That’s Right!!
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NEXT
That is not correct.
Take a moment and review your multiplications, then come back
and try again.
NEXT
EXIT GAME
Question 3
What is 123 x 4?
A.482
B. 492
C.487
D.446
That’s Right!!
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7. NEXT
Sorry, try again!
Remember the steps to multiplying large numbers.
Did you line up the numbers?
Did you remember to carry the extra number over?
Lets try Again.
Give it Another go!
What is 264x2?
428
528
548
448
That’s Right!!
Click next to continue
NEXT
That is still not quite right. Take a moment to review.
NEXT
EXIT GAME