Unit Test — Unit test

Question 1

Consider the following sets.U = {all triangles}E = {x|x ∈ U and x is equilateral}I = {x|x ∈ U and x is isosceles}S = {x|x ∈ U and x is scalene}A = {x|x ∈ U and x is acute}O = {x|x ∈ U and x is obtuse}R = {x|x ∈ U and x is right}Which is a subset of I?

Revolt · Accepted Answer

E

Question 2

Ariana, Boris, Cecile, and Diego are students in the service club. Three of the four students will be chosen to attend a conference.Which choice represents the sample space, S, for this event?

Revolt · Accepted Answer

S = {ABC, ABD, ACD, BCD}

Question 3

Ryder shot a model rocket over an area that consists of two grassy areas, shown in green, and an area with no grass, shown in white.

Revolt · Accepted Answer

0.4

Question 4

2 circles labeled Set A and Set B overlap. Set A contains 1, set B contains 3, and the overlap of the 2 circles contains 2. The number 4 is outside of the circles.

Revolt · Accepted Answer

II

Question 5

The manager of a grocery store reports that there is a 12 percent chance that a customer buys apples during a shopping trip, a 5 percent chance that a customer buy apples and carrots, and a 17 percent chance that a customer buys apples or carrots.What is the probability of a customer buying carrots?

Revolt · Accepted Answer

10.0 percent

Question 6

Belleville High School offers classes on three different foreign languages. Let A be the event that a student is in eleventh grade, and let B be the event that a student is enrolled in French class.

Revolt · Accepted Answer

A and B are independent events because P(A∣B) = P(A).

Question 7

Circle B is inside of circle A.

Revolt · Accepted Answer

A = {animals}; B = {mammals}

Question 8

A survey was taken of children between the ages of 10 and 17 about how many siblings they have and whether they have a pet. The results of the survey are shown in the table.

Revolt · Accepted Answer

Out of the 97 children who have 1 sibling, 40 of them do not have a pet.

Question 9

A survey asked about the number of people who eat breakfast almost every day (B) and the number of people who buy cereal at least once a month (C). The results of the survey are shown in the Venn diagram.

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/evresources/167dbe64a83989d2ca2f27cd2ad14b1c.png

Question 10

A farmer grows vegetables on seven acres, fruit on six acres, and flowers on two acres. Out in his fields, he finds a ladybug.To the nearest tenth of a percent, what is the theoretical probability that the ladybug was not found within the acres of flowers?

Revolt · Accepted Answer

86.7%

Unit Test — Unit test Answers

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