Practice Week 3
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School
University of Maryland, College Park *
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Course
650
Subject
Mathematics
Date
Apr 3, 2024
Type
Pages
8
Uploaded by AlexaKCalderon
Practice week 3 - Results
Attempt 1 of Unlimited
Written Feb 28, 2024 12:30 AM - Feb 28, 2024 12:33 AM
Attempt Score
9 / 100 - 9 %
Overall Grade (Highest Attempt)
9 / 100 - 9 %
Question 1
0 / 8 points
Answer:
(0.16)
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A survey of students at a college found the following majors:
Accounting - 26
Finance - 9
Economic - 12
Management - 11
What is the probability that a random student selected is a Finance major?
State your answers using two decimal digits.
Divide the number of finance majors by the total number of students
Question 2
0 / 8 points
Answer:
(0.43)
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Question 3
0 / 8 points
Answer:
(0.43)
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A survey of students at a college found the following majors:
Accounting - 12
Finance - 8
Economic - 11
Management - 13
There were no dual majors. The majors are mutually exclusive. What is the
probability that a random student selected is a Finance or Economics major?
State your answers using two decimal digits.
Add the number of finance and economics majors and divide by the total
number of students
Events A and B are mutually exclusive. Suppose P(A)=0.38 and P(B)=0.05.
What is the probability of either A or B occurring?
Use two decimal digits.
Question 4
0 / 8 points
Answer:
(0.56)
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Question 5
0 / 8 points
Answer:
(0.0020)
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Question 6
0 / 8 points
P(A or B) = P(A) + P(B). The Simple Addition Rule
Events A and B are mutually exclusive. Suppose P(A)=0.29 and P(B)=0.15.
What is the probability that neither A nor B will occur?
Use two decimal digits.
P( not(A or B) ) = 1 - P(A or B) = 1- ( P(A) + P(B) ) = 1 - P(A) - P(B). This is the
Complement rule.
You flip a coin 9 times. What is the probability that all 9 flips are Heads?
Use 4 decimal digits.
P(H)^number of flips = 0.5^number of flips
30% of the cars in a dealer lot are red, 23% are black, and 24% are white. The
remainder are some other colors.
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