1. Please get in groups of 3 (you need 8 half sheets of paper)
Probability Review
Please get in groups of (you need 8 half sheets of paper)

2. List the letter of the following situations if they are independent.
(you can have more than one answer)
A) Rolling a die and then rolling another die
B) Choosing two cards out of a deck without replacement
C) Choosing a card out of deck and then flipping a coin
D) Having four children.
E) Randomly choosing a movie to see on Friday night and then randomly picking a different movie to see on Saturday night. #1

3. A, C and D
#1 answer

4. Shade a Venn diagram so that it shows (AUC) B#2

5. #2 answer

6. The probability that a family owns a DVD player is
The probability that a family owns a DVD player is .71 and the probability that the family owns a sewing maching is Assume that these events are independent.
What is the probability that a randomly chosen family owns a sewing machine OR DVD player? (hint: you need a formula) #3

7. Ans: (.48)(.71)= .8492
#3 answer

8. What is the probability of rolling two die and getting a sum of a prime number or a number larger than 10? #4 1 2 3 4 5 6 7 8 9 10 11 12

9. 15/ /36 – 2/36 = 16/36
#4 Answer

10. #5 Find the following probabilities if a person is picked at random
College Graduate
Not a college Grad
Smoker 35 80
Non-smoker
130
175 #5
Find the following probabilities if a person is picked at random
P(smoker or college graduate)
P(non smoker | college graduate)
P(non graduate | smoker)
(2 correct gives you one pick, three correct gives you two picks)

11. A) 245/420
B) 130/165
C) 80/115
#5 Answer

12. A family is going to have exactly three children
A family is going to have exactly three children. They would love to have both genders. What is the probability they have both genders? #6

13. 6/8 = ¾
(hint: a tree diagram helps)
#6 Answer

14. You pick two cards out of a well shuffled deck without replacement
You pick two cards out of a well shuffled deck without replacement. What is the probability that they are both not hearts? #7

15. (39/52)(38/51)= 1482/2652 = 371/663=.56
#7 Answer

16. A family has three children
A family has three children. If you know they had at least one girl, what is the probability that they had all girls? #8

17. 1/7 Again a tree diagram helps.
#8 Answer