4. Anticipatory Set
Answer the following in complete sentences.
1.) Using your knowledge of American History, describe what
independence and dependence means.
Independence Dependence
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5. Independent Events: One event does NOT effect the probability
of the other.
Dependent Events: One event does effect the probability
of the other.
State whether each set of events is independent or
dependent. Explain each answer.
1.) Erica flips a coin and then she rolls a die.
2.) John chooses a classmate for his group and then chooses
another classmate for his group.
3.) Jane rolls a six sided die and then rolls another six sided
die.
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6. Theoretical Probability of Two Independent Events
P(A and B) =
1.) Find the theoretical probability of getting a head on a coin and
then rolling a five on a six sided die.
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7. Theoretical Probability of Two Dependent Events
P(A and B) =
2.) Steve has three $1 bills, five $10 bills, and two $20 bills in his
wallet. If he picks one bill at a time at random, what is the
probability of him picking two $20 bills?
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8. 1.) A reading list contains 5 historical books and 3 science-fiction
books. What is the probability that Alex will randomly choose a
historical book for his first report and a science-fiction book for
his second without replacement?
science-fiction
science-fiction
science-fiction
historical
historical
historical
historical
historical
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9. 2.) Find the probability of choosing a green marble at random
from a bag a 5 green and 10 white marbles and then getting a tail
on a coin flip.
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10. 3.) Jill has seven quarters in her pocket. Of these, three are
“Delaware” quarters, two are “Georgia” quarters, one is a
“Connecticut” quarter, and one is a “Pennsylvania” quarter. Jill
removes one quarter at random and then removes a second quarter
at random without replacing the first quarter. What is the
probability that both will be “Delaware” quarters?
Connecticut
Delaware
Delaware
Georgia
Pennsylvania
Georgia
Delaware
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11. 4.) On a multiple choice test, each question had four possible
answers. A student does not know the answers to two questions,
so he guesses. What is the probability that the student will get
both answers wrong?
1.) The sky is:
a.) Blue b.) Black c.) Red d.) Orange
2.) 2 + 2 =
a.) 2 b.) 3 c.) 4 d.) 5
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12. 5.) In a bag there are 5 blue, 2 red, and 3 green marbles. What is the
probability of choosing a blue marble at random and then choosing a
green marble if you replace the first marble?
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14. BEFORE YOU LEAVE
1.) Explain, in a complete sentence, whether the probability of
two events is greater or less than the probability of each
individual event.
2.) How are dependent and independent events similar and
different?
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16. AIM: Independent and
Dependent Events
2.) Find the probability of choosing a green marble at random
from a bag a 5 green and 10 white marbles and then getting a tail
on a coin flip.
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17. AIM: Independent and
Dependent Events
1.) A reading list contains 5 historical books and 3 science-fiction
books. What is the probability that Alex will randomly choose a
historical book for his first report and a science-fiction book for
his second without replacement?
science-fiction
science-fiction
science-fiction
historical
historical
historical
historical
historical
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