Unit 1 Outcomes and Likelihoods 8th Grade a multiple Choice



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Unit 1 - Outcomes and Likelihoods - 8th Grade - A

Multiple Choice

Identify the choice that best completes the statement or answers the question.

____ 1. A bag contains orange, white, and purple marbles. If you randomly choose a marble from the bag, there is a 40% chance of drawing an orange marble and a 29% chance of drawing a white marble. Give the probability for each outcome. Express your answers as percents.



a.





c.




b.



d.


____ 2. Consider the spinner shown. Give the probability for each outcome of the spinner. Express your answers as decimals.





a.




c.




b.




d.



____ 3. Devon has one quiz each week in computer class. The table gives the probability of having a quiz on each day of the week. What is the probability that Devon will have a quiz Tuesday, Thursday, or Friday? Express your answer as a percent.



Day

Monday

Tuesday

Wednesday

Thursday

Friday

Probability

0.11

0.29

0.050

0.17

0.38




a.

84%

c.

38%

b.

11%

d.

29%

____ 4. Josh works at the local deli making sandwiches. Each sandwich has 1 type of cheese and 1 type of meat on bread. The deli has white, wheat, and rye bread available. The meat choices are turkey and ham, and the cheese choices are American and Swiss. Describe all possible sandwiches that Josh can make at the deli.



a.

The possible sandwich combinations are (wheat, American, turkey), (wheat, American, ham), (wheat, Swiss, turkey), (wheat, Swiss, ham), (rye, American, turkey), (rye, American, ham), (rye, Swiss, turkey), and (rye, Swiss, ham).

b.

The possible sandwich combinations are (wheat, American, turkey), (wheat, American, ham), (wheat, Swiss, turkey), (wheat, Swiss, ham), (white, American, turkey), (white, American, ham), (white, Swiss, turkey), and (white, Swiss, ham).

c.

The possible sandwich combinations are (wheat, American, turkey), (wheat, American, ham), (wheat, Swiss, turkey), (wheat, Swiss, ham), (white, American, turkey), (white, American, ham), (white, Swiss, turkey), (white, Swiss, ham), (rye, American, turkey), (rye, American, ham), (rye, Swiss, turkey), (rye, Swiss, ham), (wheat, Swiss, American), (white, Swiss, American), and (rye, Swiss, American).

d.

The possible sandwich combinations are (wheat, American, turkey), (wheat, American, ham), (wheat, Swiss, turkey), (wheat, Swiss, ham), (white, American, turkey), (white, American, ham), (white, Swiss, turkey), (white, Swiss, ham), (rye, American, turkey), (rye, American, ham), (rye, Swiss, turkey), and (rye, Swiss, ham).

____ 5. A state offers specialty license plates that contain 3 letters followed by 2 numbers. License plates are assigned randomly. All license plates are equally likely. Find the probability of being assigned the license plate LXO 81. Express your answer as a fraction in simplest form.



a.



c.



b.



d.


____ 6. While waiting for the school bus, Michiko records the colors of all cars passing through an intersection. The table shows the results. Estimate the probability that the next car through the intersection will be red. Express your answer as a percent. If necessary, round your answer to the nearest tenth.



Car Color

Red

Silver

Gray

Black

Number of Cars

11

24

16

9




a.

11%

c.

18.3%

b.

81.7%

d.

22.4%


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