Download probability review

Name____________________
PROBABILITY REVIEW
1) Sophia rolled 2 number cubes and found the sum. She played the game many times and recorded the sums in
the line plot below. Find the experimental probability in simplest form.
a) P(3) =_____
b) P(12) =______
c) P(not 8) =_______
2 &3: You have 3 red marbles, 4 yellow marbles, and 1 blue marble in a bag. Find the probabilities below.
2) P (red, then yellow), without replacement
3) P (red, then red), without replacement
4) A number cube has 6 sides. The sides are numbered 1 to 6. If the cube is rolled once, what is the probability of not
rolling a 5?
5) A bag contains 3 yellow marbles, 8 green marbles, 2 purple marbles, 10 blue marbles, and 5 red marbles. What is the
probability of pulling out a yellow or a blue marble? P(Y or B)
6) What is it called when you find the probability that an event will NOT happen?
7) A bag contains only blue and green blocks. If the probability of drawing a blue block is 7/12, what is the probability
of drawing a green block?
8) A new line of mountain bikes comes in three models: the Jetstar, the Road Hawk, and the Eagle. Each bike comes in
two colors – black or red. Make a tree diagram and a list to show all of the possible combinations of bikes.
a) TREE:
c) Total possible combinations:
d) P (red Jetstar) =
e) P (black) =
b) LIST:
9) Avery has 5 swimsuits, 2 cover-ups, and 3 pairs of sandals for her spring break trip. How many different outfits can
she make?
10) A number cube (a dice) with faces numbered 1 to 6 is rolled 30 times. Predict the number of times a 4 will be rolled.
11) Ryan has a spinner that is divided into eight sections: 2 red, 3 blue, 1 yellow and 2 white. Predict the number of
times the spinner will land on blue if he spins it 160 times.
12) Nate has a bag containing 3 red, 2 blue, 4 yellow, and 3 green marbles. If he randomly chooses a marble and does
not replace it before choosing a second marble, find the probabilities below.
a) P (blue, blue) without replacement____________
b) P (yellow, green) ___________
13) A spinner and cube are used in a game. The spinner has an equal chance of landing on 1 of 4 colors: red,
purple, blue, or green. The faces of the cube are labeled 1 through 6. What is the probability of a player spinning
the color red and then rolling a six?
14) Last basketball season Austin made 6 out of 10 shots at the free throw line. Based on this, what is the
probability that Austin will miss his first free throw shot this season?
15) A spinner has an equal chance of landing on 1 of 4 colors: red, purple, blue, or green. What is the probability
that Ann will spin and land on a black?
16) There are 4 girls and 3 boys in Mrs. Clayton's art class. Mrs. Clayton wrote the names of each student on
identical pieces of paper and placed them in a bag. If two names are drawn from the bag at random without
replacement, what is the probability of drawing a girl's name then a boy's name?
17) The pictures below show the choices for a lunch special at a restaurant.
How many combinations of 1 sandwich, 1 side order, and 1 drink are possible for the lunch special at this
restaurant?
18) The probability of Mr. Bohac giving a lunch detention is 1/10. If there are 200 students in lunch, predict how
many should get detentions.
19) Bob’s Lunch Café offers 3 kinds of sandwich fillings and 3 kinds of bread. Which table shows all the
possible sandwich combinations at Bob’s Lunch Café.
20. Fazio is selecting a jersey. His choices are shown below.
Fazio chooses a jersey at random and then replaces it. He then selects a second jersey at random. What is the
probability that Fazio selects a striped jersey both times?
F
1
100
G
1
16
H
1
25
J
1
81
21) The arrow on each spinner shown below will be spun one time.
Which of the following diagrams shows all the possible outcomes when each arrow is spun once?