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Question 1
On a table, there are 18 english books, 25 math books, 22 science books, 21 history books, and 14 social study books. If a professor is selected at random, what is the probability that it is a history book?
A. 0.22B. 0.21
C. 0.021D. 0.12
Question 2
On a table, there are 18 english books, 25 math books, 22 science books, 21 history books, and 14 social study books. If a professor is selected at random, what is the probability that it is either a history book or a social study book?
A. 0.21B. 0.14
C. 0.35D. 0.25
Question 3
In a season five top players of a team scored following numbers of goals.

PlayerNumber of goals
James150
Tim128
Corian98
Phil101

If they keep the same performance, what is the experimental probability that the next goal will be scored by Phil?
A. 101/477B. 1/101
C. 0.101D. 1.01
Question 4
In a season five top players of a team scored following numbers of goals.

PlayerNumber of goals
James150
Tim128
Corian98
Phil101

If they keep the same performance, what is the experimental probability that the next goal will not be scored by Phil or Corian?
A. 150/477B. 278/477
C. 199/477D. 128/150
Question 5
In a restaurant, there are 5 managers, 15 servers, 10 cooks and 15 other personnel. If a person is selected at random, what is the probability that the person is either a manager or a cook?
A. 1/5B. 15/40
C. 1/3D. 1/15
Question 6
In a restaurant, there are 5 managers, 15 servers, 10 cooks and 15 other personnel. If a person is selected at random, what is the probability that the person is neither a manager nor a cook?
A. 1/3B. 1/15
C. 3/2D. 2/3
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Question 7
Probability that event A will occur is 0.33. What is the probability that event A will not occur?
A. 0.17B. 0.33
C. 0.67D. 0.50
Question 8
Probability that event A will occur is 0.6. Probability that event B will occur is 0.80. What is the probability that event A and event B both will occur?
A. 0.6B. 0.14
C. 0.48D. 0.86
Question 9
Probability that event A will occur is 0.6. Probability that event B will occur is 0.80. What is the probability that neither event A nor event B will occur?
A. 0.08B. 0.48
C. 0.52D. 0.62
Question 10
Probability that event A will occur is 0.6. Probability that event B will occur is 0.80. What is the probability that event A will occur but event B will not occur?
A. 0.6B. 0.2
C. 0.12D. 0.32
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