Name__________________________________Period______
Study guide for Probability quiz
1. What is the probability of getting an odd number in one roll of a pair of
fair six sided number cube?
2. The probability is
3
what is the percent?
8
3. I have 6 red marbles and 12 white marbles in a bag. What is the
probability of picking a white marble in 1 pick?
4. I have 8 red marbles and 4 white marbles in a bag. What is the probability
of picking a white marble and then a red marble if I put the white marble
back in the bag?
5. The probability of an event happening is 55% what is it represented as a
fraction?
6. I have 10 black socks, 26 red socks, and 14 white socks in a drawer. If I
pick out two socks randomly what is the probability that they will both be
black?
7. Spinning a equally likely eight numbered spinner and getting 4 is an
independent event. A. True B. False one time
8. Problem 3 is an example of a independent event. A. True B. False
9. What is the P(T,H,H,H,H,t) in 6 flips of a fair coin?
10. What is the probability of getting a 5 in one roll of a pair of fair six sided
number cubes?
11. If I roll two six sided dice what is the probability the total will 7? What is
the P( total number shown added together is >5) in one roll of a pair of fair six sided
number cubes?
12. The probability of being chosen to represent your school at an Academic
competition
5
is
, what is the probability you will not be chosen?
250
13. If you spin a fair spinner numbered 1-8 what is the P(the number shown will be
>7).
14. A survey of statistics in Georgia found that a person born there has a .006
probability of being born a fraternal twin and a .024 probability of being born
an identical twin. What is the probability if you are born in Georgia you will not
be a twin?
15. Mr. Heiser’s homeroom has 16 young men and eight young women if he picks a
student totally at random what is the probability it will be a young man?
16. If you toss a fair two sided coin 5 times What is the P(H,T,H,H,T)?
17. A new company in Canton has set up an employee ID code system that gives
every employee a code that starts with a letter from the alphabet and is followed
by one numbers. How many employees can they employ until they need to add
another number position?
18. A restaurant has a buffet bar that has three main entrees chicken, steak or fish,
three sides’ fries, slaw, or beans, and three desserts ice-cream, pie, or carrot
cake. Draw a tree diagram showing all the combinations of one main, one side
dish and one dessert.