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Worksheets

probality

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

What is the theoretical probability of rolling a 5 on a fair six-sided die?

a)

1/6

b)

1/4

c)

1/3

d)

1/2

2.

If the probability of event A is 0.4 and the probability of event B is 0.3, what is the probability of both events A and B occurring?

a)

0.34

b)

0.1

c)

0.7

d)

0.12

3.

If the probability of event A is 0.6 and the probability of event B is 0.5, what is the probability of either event A or event B occurring?

a)

0.3

b)

0.2

c)

1.1

d)

0.9

4.

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of randomly selecting a blue marble?

a)

4/10

b)

2/10

c)

3/10

d)

1/5

5.

If the probability of event A is 0.2 and the probability of event B is 0.6, and A and B are independent events, what is the probability of both events A and B occurring?

a)

0.8

b)

0.4

c)

0.12

d)

0.02

6.

If the probability of event A is 0.7 and the probability of event B is 0.4, and A and B are independent events, what is the probability of either event A or event B occurring?

a)

0.9

b)

1.1

c)

0.3

d)

0.2

7.

A spinner is divided into 8 equal sections, numbered 1 through 8. What is the probability of the spinner landing on an even number?

a)

1/4

b)

1/2

c)

3/8

d)

2/3

8.

If the probability of event A is 0.3 and the probability of event B is 0.5, what is the probability of event A not occurring?

a)

0.8

b)

0.5

c)

0.3

d)

0.7

9.

A box contains 4 red balls, 5 blue balls, and 3 green balls. What is the probability of randomly selecting a red or green ball?

a)

5/12

b)

7/12

c)

3/4

d)

2/3

10.

If the probability of event A is 0.8 and the probability of event B is 0.2, and A and B are independent events, what is the probability of event A occurring and event B not occurring?

a)

0.50

b)

0.30

c)

0.64

d)

0.10