Prealgebra Probability

JEOPARDYI’m Certain to

get an AI’m probably

going to get an AI’m likely to

get an A

50

40

30

20

10 10

20

30

40

50

10

20

30

40

50

I’m likely to get an A: 10 points

You have a choice between 4 shirts, 2 pants and 5 shoes. How many different outfits do you

have? ANSWER

40

I’m likely to get an A: 20 points

You pull one marble randomly from a bag. What is the

probability of pulling a red or green marble?

ANSWER

2

5

I’m likely to get an A: 30 points

Liam randomly pulls a marble from the bag, records its color, and puts it back. What is the probability that he pulls out a yellow marble

followed by a red marble?

ANSWER

3

100

I’m likely to get an A: 40 points

Andrew pulls out a marble, records its color and puts it back. What is the

probability of Andrew pulling out a green marble, followed by not green, followed

by a blue marble?

ANSWER

3

40

I’m likely to get an A: 50 points

Alea has a set of cards. She pulls our a card, records its color, and replaces it.

There is a chance of picking a purple

card. If she picks two cards, what is the likelihood that one is purple and one is

not purple in any order? ANSWER

3

4

3

8

I’m probably going to get an A: 10 points

Lauren rolls a fair 8-sided number cube, numbered 1-8.

What is the probability that she does not roll a 1 or 2?

ANSWER

3

4

I’m probably going to get an A: 20 points

Jenna rolls a fair 8 sided number cube, numbered 1-8.

What is the probability that she rolls an even number and

a prime number?ANSWER

1

8

I’m probably going to get an A: 30 points

Sonic rolls a fair 8-sided number cube, numbered 1-8.

What is the probability that he rolls a 4 or an odd

number?

ANSWER

5

8

ANSWER

I’m probably going to get an A: 40 points

Alex has a bag of colored marbles. He pulls out a marble, records its

color and replaces it. He does this 50 times. He pulls out a red marble 30 times. He pulls out a green marble 8 times, and a blue marble 12 times. Based on this data, what is he most likely going to pull out the next 10

times?

6 red, 2 green and 2 blue marbles.

I’m probably getting an A: 50 points

Marina has a fair number cube with the numbers 1, 2, 3, 4 written on it. She has a second fair number cube

with the numbers 2, 5, and 10 written on it. She rolls both number cubes

and finds the product of the numbers rolled. What are all of the possible

even outcomes

ANSWER

2, 4, 6, 8, 10, 20, 30, 40

I’m certain to get an A: 10 points

Carly has a fair 6 sided number cube numbered 1-6. Event A is

rolling a 3. What is the complement of A?

ANSWER

Rolling not a 3.

Rolling a 1, 2, 4, 5, 6

ANSWER

I’m certain to get an A: 20 points

Carrie has 6 blue cups, 3 red cups, 9 green cups and 2 pink

cups. She randomly stacks them. What is the probability that the last cup in the stack is

blue?

3

10

ANSWER

I’m certain to get an A:30 points

Sana randomly picks a card from a bag, records it, and replaces it. The

cards are all colored and have numbers on them. There is a 40% chance of pulling a red card and a

chance of pulling out a prime number card. What is the probability of pulling out a red card followed by

not a prime number?

2

7

4

7

ANSWER

I’m certain to get an A:40 points

Avleen pulls a marble from the bag, records it, and replaces it. What is the probability of her pulling out a red or

blue marble, followed by a green or red marble?

11

50

ANSWER

I’m certain to get an A:50 points

In a bag of marbles, there is a 40% chance of pulling out a red marble. Shruthi pulls out a marble, records its color, and replaces it. What is

the probability that she pulls out at least one red marble on two

consecutive draws?

16

25

No Pressure No Problem10 points

What is the joke in Mr. D.’s poster that says

math illiteracy affects 8 out of every 5 people?

ANSWER

You can’t have 8 people affected if only 5 people are the total.

ANSWER

No Pressure No Problem:20 points

8 out of 10 students prefer Summer over Winter. If 36

students prefer Summer, how many students were surveyed?

45 students were surveyed

ANSWER

No Pressure No Problem30 points

8 out of 10 students prefer Summer over Winter. If 36

students prefer Summer, how many prefer Winter?

9 students

ANSWER

No Pressure No Problem40 points

In a grade there are 4 boys for every 5 girls. If there are

189 total students, how many boys are there and how many girls are there?

84 boys and 105 girls

ANSWER

No Pressure No Problem50 points

The number of boxes a carpenter makes is directly proportional to the number of days she works. If she

can make 24 boxes in 48 days, how many boxes can she make in 240

days? What is the constant of

proportionality in this problem, and what is the direct proportion

equation?

She can make 120 boxes.k=1/2

1

2y x

Answer

I’m Getting an A on this Test10 points

Y is directly proportional to x and the direct proportion equation is y=15x. What

does x equal when y is 75?

X = 5

I’m Getting an A on this test20 points

How can you tell from a graph if y is directly proportional to x?

Answer

Part 1: The line must go through the origin and be straight.

Answer

I’m Getting an A on this test:

30 pointsName an

ordered pair that is on the

line that is NOT the unit rate. What

does it represent?

(2,100) 2 nights for $100(3,150) 3 nights for $150

Answer

I’m Getting an A on this test 40 points

If the ratio of boys to girls in the class is 2:3, is it possible to have 36 students in the class? Why

or why not?

No, because 36 is not a multiple of 5

Answer

I’m Getting an A on this test50 points

Solve for x

X = 40