Download Unit 7 study guide Key The graph below shows the number of boys

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Unit 7 study guide Key
The graph below shows the number of boys and the number of girls on a school’s debate team.
If a student is chosen at random from the team, what is the probability that the student is a boy?
A 0.4
B 0.6
Which is the probability that a 1-6 number cube lands on a number less than 2?
A 0.67
C 0.33
B 0.50
D 0.17
Which is the probability that a card drawn from a standard deck is red and an 8?
A 0.25
C 0.08
B 0.16
D 0.04
A company is testing a new method of manufacturing a part for their machines. They tested parts
using the old and new methods.
Parts Performance by Age
New
Old
Passed
5
23
Failed
2
30
What is the approximate probability that a part chosen at random from this group is new and
passed the test?
A 0.083
C 0.383
B 0.117
D 0.467
The table shows the results of a consumer survey asking men and women where they prefer to shop.
Shopping By Gender
Male
Female
Store A
12
6
Store B
4
14
What is the probability that a person chosen from this group is a male who prefers Store A?
Answer : 1/3 or 0.33…
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