Probability and Statistics, Math worksheet for Grade 8 at myTestBook.com

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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.	0.22	B.	0.21
C.	0.021	D.	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.	0.21	B.	0.14
C.	0.35	D.	0.25

Question 3

In a season five top players of a team scored following numbers of goals.

If they keep the same performance, what is the experimental probability that the next goal will be scored by Phil?

101/477

1/101

0.101

1.01

Question 4

In a season five top players of a team scored following numbers of goals.

If they keep the same performance, what is the experimental probability that the next goal will not be scored by Phil or Corian?

150/477

278/477

199/477

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.	1/5	B.	15/40
C.	1/3	D.	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.	1/3	B.	1/15
C.	3/2	D.	2/3

Question 7
Probability that event A will occur is 0.33. What is the probability that event A will not occur?
A.	0.17	B.	0.33
C.	0.67	D.	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.	0.6	B.	0.14
C.	0.48	D.	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.	0.08	B.	0.48
C.	0.52	D.	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.	0.6	B.	0.2
C.	0.12	D.	0.32

Question No Answer
1 B
2 C
3 A
4 B
5 C
6 D
7 C
8 C
9 A
10 C

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