Unit Test — Unit test Answers

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The table below shows all of the possible outcomes for rolling two six-sided number cubes.What is the probability of rolling a sum of 8?

Question illustration
A
StartFraction 1 over 12 EndFraction
Option A
B
StartFraction 5 over 36 EndFraction
Option B
C
StartFraction 1 over 6 EndFraction
Option C
D
StartFraction 7 over 36 EndFraction
Option D
3
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Lewis is rolling a 10-sided die 250 times. Each side of the die is labeled with a number 1 – 10. Based on the theoretical probability, how many times would Lewis be expected to roll a multiple of 3?

A
25
B
30
C
75
D
83
4

A package contains 4 red, 2 green, 8 purple, and 6 blue jelly beans. What is the probability of choosing a purple jelly bean, eating it, and then choosing a blue jelly bean?

A
StartFraction 1 over 400 EndFraction
Option A
B
StartFraction 1 over 380 EndFraction
Option B
C
StartFraction 3 over 25 EndFraction
Option C
D
StartFraction 12 over 95 EndFraction
Option D
5

The theoretical probability of an event occurring is . Which best describes the experimental probability associated with this event?

Question illustration
A
Out of every 5 trials, the desired outcome will occur exactly 2 times.
B
Out of every 5 trials, the desired outcome will occur approximately 2 times.
C
Out of every 7 trials, there will be 2 desired outcomes and 5 undesired outcomes.
D
Out of every 7 trials, there will be 5 desired outcomes and 2 undesired outcomes.
6

A restaurant is offering a dinner special that includes one starter and one entree. The choices are listed below.Starter: breadsticks, soup, saladEntree: beef, fish, chicken, shrimp, porkHow many possible dinner special combinations are there?

A
5
B
8
C
10
D
15
7

The 7 a.m. flight from Dallas to Chicago is on time 75% of the time. Fran created this spinner to simulate the scenario.Fran spun the spinner three times to predict whether the flight will be on time or late next Monday, Tuesday, and Wednesday. How should she interpret this outcome of the three spins: shaded-shaded-unshaded?

Question illustration
A
The flight will be late all three days.
B
The flight will be on time all three days.
C
The flight will be late on one of the three days.
D
The flight will be on time on one of the three days.
8

Selena is buying an audio system for her car. She can choose among 3 types of stereos, 4 kinds of speakers, and 2 kinds of amplifiers. Which describes how Selena can show her options?

A
List the 3 types of stereos. Draw branches from each type and list the 4 speakers at the ends. Then, draw branches from each speaker type and list the 2 amplifiers at the ends.
B
List the 3 types of stereos. Draw branches from each type and list the 4 speakers at the ends.
C
List 1 stereo. Draw a branch from the stereo and list 1 speaker at the end. Then, draw a branch from the speaker and list 1 amplifier at the end.
D
List the 3 types of stereos. Draw branches from each type and list the 4 speakers at the ends. Then, draw a branch from the speaker and list 1 amplifier at the end.
9

The probability of choosing a penny from the 1980s from the bag of pennies without looking is . Which term best describes this probability?

Question illustration
A
impossible
B
unlikely
C
likely
D
certain
10

The spinner is divided into 8 equal sections. What is the probability of spinning G, green?

Question illustration
A
One-fourth
Option A
B
StartFraction 3 over 8 EndFraction
Option B
C
One-half
Option C
D
Three-fourths
Option D
11

A box contains 2 purple marbles, 2 blue marbles, 3 green marbles, and 5 red marbles. Which color marble is most likely to be picked?

Question illustration
A
purple
B
blue
C
green
D
red
12

Five out of six residents of Mayville have library cards. Which tool will best allow Darren to simulate this scenario and predict whether a randomly chosen resident has a library card?

A
a coin
B
a 5-sector spinner
C
a number cube
D
a bag of 11 marbles
13

Josephine noticed that out of 10 e-mails she received, 7 were advertisements. What can she predict about the number of advertisements she will receive in the next 100 e-mails?

A
She will receive 7 advertisements.
B
She will receive 10 advertisements.
C
She will receive 70 advertisements.
D
She will receive 90 advertisements.
14

Michael practiced batting and kept track of his hits. He missed 2 balls but hit 8 balls that were pitched to him. How many balls can Michael predict to hit if he is pitched 20 balls?

A
4 balls
B
8 balls
C
16 balls
D
18 balls
15

Gerald is conducting an experiment with 3 possible outcomes. Kasey is conducting an experiment with 20 possible outcomes. Which statement best relates the possible outcomes to the number of trials needed to produce results similar to their predicted outcomes?

A
Gerald will need to conduct more trials than Kasey because there are fewer possible outcomes in his experiment.
B
Gerald will need to conduct fewer trials than Kasey because there are fewer possible outcomes in his experiment.
C
Gerald will need to conduct more trials because he needs to make up for the difference in the number of possible outcomes.
D
Gerald will need to conduct fewer trials because experimental and theoretical results in experiments with small numbers of possible outcomes are the same.
16

Juanita rolls a number cube x times. For which value of x are the experimental probability and the theoretical probability most likely to be equivalent?

A
1
B
6
C
600
D
1,000
17

The Mendoza family is shopping for a new laptop computer. They will make their decision based on size and brand. The family made a table to show the possible outcomes for the different choices. There are 12 possible outcomes. Which is a possible number of sizes and brands from which the family could choose?

A
6 sizes and 6 brands
B
4 sizes and 3 brands
C
2 sizes and 12 brands
D
4 sizes and 8 brands
18

Vince makes 75% of his free throw attempts. He wants to create a tool that will simulate his free throw shooting and allow him to predict the probability that he will make 6 of his next 7 free throw attempts.Which spinner simulation uses an appropriate device and has the correct number of trials?

A
a spinner divided into 2 congruent sectors, spun 6 times
B
a spinner divided into 2 congruent sectors, spun 7 times
C
a spinner divided into 4 congruent sectors, spun 6 times
D
a spinner divided into 4 congruent sectors, spun 7 times
19

Maria rolls a regular number cube with sides labeled 1 through 6. How many possible outcomes are there?

A
4
B
5
C
6
D
7
20

The experimental probability of getting a 6 on a number cube is . Which is true about the event’s experimental probability?

Question illustration
A
The number 6 came up a total of 40 times.
B
The number 6 came up 7 times out of a total of 40 trials.
C
The number cube was rolled a total of 47 times.
D
After 7 trials, the number 6 came up 40 times.
21

A bag contains 1 blue, 2 green, 3 yellow, and 3 red marbles, as shown. Which best describes the complement of choosing a red marble?

Question illustration
A
choosing a green or blue marble
B
choosing any marble
C
choosing a blue, green, or yellow marble
D
choosing a yellow marble

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