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Probability Review

Last updated about 5 years ago

18 questions

Note from the author:

Probability

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Question 1

1.

Samuel has a bag containing 6 blue marbles, 2 red marbles, and 4 green marbles. What is the probability of Samuel pulling a blue marble, not replacing it, and then pulling a marble other than blue from the bag?

Question 2

2.

Jacobi has a jar with 12 marbles, 5 are red. What is the probability of selecting a red marble from the jar? What is the complement? (Example for answer 1/30 and 3/25 to enter both answers)

Question 3

3.

The probability of drawing a red marble from a bag is 1/9. The probability of drawing a green marble from a different bag is 1/5. If a marble is drawn from each bag, what is the probability of drawing a red marble out of the first bag and a green marble out of the second bag?

Question 4

4.

On the first day of school, Ms. Miller places 9 blue and 16 green pencils on each of her 25 desks. As students arrive, she randomly assigns them a desk. What is the probability that the first student will be assigned a desk with a blue pencil?

Question 5

5.

If a number cube is rolled once and a coin is flipped once, what is the probability that an even number will be rolled, and the coin will land on heads?

Question 6

6.

Rafael flips four coins. What is the probability of them all landing on tails?

Question 7

7.

Martha had a bag containing 8 red, 2 green, 5 purple, and 4 blue tiles. What is the probability of drawing a green tile, not replacing it, and then drawing a red tile?

Question 8

8.

Natalie had four different cheerleading tops: a purple tank, a purple sweater, a gold tank, and a gold sweater. What is the probability of Natalie randomly selecting a gold top on Monday, not replacing it, and then randomly selecting a purple top on Tuesday?

Question 9

9.

The probability of selecting a purple marble from the first bag is 1/8. The probability of selecting a green marble from the second bag is 1/6. If one marble is selected from each bag, what is the probability of selecting a purple marble from the first bag, then selecting a marble other than green from the second bag?

23/24

5/14

1/48

5/48

Question 10

10.

Mrs. Gonzalez has 27 students in her class. Eighteen students completed their homework on time. What is the probability of students that have not completed their homework?

Question 11

11.

Brad has these bags of chips in his kitchen cabinet:
- 6 bags of Funyuns
- 4 bags of Takis
- 3 bag of Doritos
Brad will randomly choose one bag of chips without replacing it, and randomly choose another bag of chips. What is the probability that he will choose a bag of Funyuns and then a bag of Doritos?

Question 12

12.

Larissa has a bag of candy. There are a total of 14 candies in the bag, 7 Reese’s Pieces , 4 Skittles, and the rest are Jolly Ranchers. What is the probability of choosing a Jolly Rancher, eating it and then choosing Skittles?

Question 13

13.

Liam has a bag containing 5 red, 2 blue, 5 green, 6 yellow, and 2 white marbles that are all the same size and shape. What is the probability of randomly choosing a green marble on the first pick, not replacing it, and then randomly choosing a green marble on the second pick?

1/4

1/5

1/19

1/16

Question 14

14.

Melissa ordered pizza with 8 slices. Three slices of pizza have cheese, and the rest are only jalapenos . What is the probability of Melissa randomly taking a slice of pizza with cheese?

Question 15

15.

A fair number cube and a spinner are used in a game. The faces of the number cube are labeled 1 through 6. The spinner has an equal chance of landing on 1 of 5 colors: red, green, blue, yellow or black. What is the probability of a player rolling an even number and then spinning green?

7/10

1/10

1/30

1/7

Question 16

16.

P (a number) =

Question 17

17.

P (4) =

Question 18

18.

A spinner and a fair number cube are used in a game. The spinner has an equal chance of landing on 1 of 6 colors: red, purple, blue, green, white, or orange. The faces of the cube are labeled 1 through 6. What is the probability of a player spinning the color green and then rolling an even number?