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Probability Formative

Total questions: 25

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

a)

5/11

b)

5/6

c)

1/3

d)

5

2.

Based on the chart, what is the experimental probability of pulling a green marble?

a)

1/8

b)

8/25

c)

8/100

d)

7/8

3.
The probability of it raining today is 30%.  What is the probability that it will NOT rain?
a)
30%
b)
70%
c)
100%
d)
0%
4.
If you roll one die, what is the probability of getting an odd number or a 4?
a)
2/3
b)
1/3
c)
1/2
d)
1/6
5.
The enrollment at Southburg High School is 1400.  Suppose 550 students take French, 700 take algebra, and 400 take both French and algebra.  What is the probability that a student selected randomly takes French or algebra?
a)
1250/1400
b)
700/1400
c)
550/1400
d)
17/28
6.
What is the probability that the person picked will be a boy given they speak german? 
a)
.7273
b)
.4
c)
.16
d)
.22
7.
What is the probability that a student plays an instrument 
a)
.55
b)
.5
c)
.45
d)
.4
8.
What is the probability that a student plays on a sports team given they don't play an instrument? 
a)
.7273
b)
.8
c)
.55
d)
.2222
9.
P(Pizza|Senior):
a)
10/15
b)
4/5
c)
2/3
d)
10/5
10.
You roll a six sided die. What is the probability of rolling an even number three times in a row? 
a)
3/100
b)
1/2
c)
1/6
d)
1/8
11.

You perform an experiment to determine how well plants react to light. Out of 30 plants in the experiment, 12 receive visible light, 15 get ultraviolet light, & 6 receive both types of light. What's the probability that a plant receives visible or ultraviolet light?

a)

0.9

b)

0.7

c)

0.2

d)

0.3

12.
A bag contains 30 pieces of candy. There are 15 grape, 7 cherry, 3 lemon, 5 strawberry. What is the probability of drawing a lemon?
a)
3
b)
1/10
c)
3/10
d)
30%
13.
What is the probability of spinning green?
a)
0
b)
1/4
c)
1/2
d)
3/4
14.

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

a)

3/10

b)

3/9

c)

1/9

d)

1/3

15.

Two fair coins are tossed. What is the probability of getting at most one head? (Hint: Create a sample space)

a)

1/2

b)

3/4

c)

1/4

d)

1

16.
At a community swimming pool there are 2 managers, 8 lifeguards, 3 concession stand clerks, and 2 maintenance people.  If a person is selected at random, find the probability that the person is either a lifeguard or a manager.
a)
2/3
b)
8/15
c)
2/15
d)
not enough information
17.
The Bargain Auto Mall has these cars in stock.  If a car is selected at random, find the probability that it is Domestic or an SUV.
a)
210/300
b)
85/300
c)
295/300
d)
230/300
18.
A recent study of 200 nurses found that of 125 female nurses, 56 had bachelor's degrees:  and of 75 male nurses, 34 had bachelor's degrees.  If a nurse is selected at random, find the probability that the nurse selected is a male nurse with a bachelor's degree.
a)
56/200
b)
34/200
c)
75/200
d)
125/200
19.
What is the probability that a student does play a sport given they do not play an instrument? 
a)
.2
b)
.2222
c)
.10
d)
.5
20.
If an event cannot occur, then its probability is 
a)
1
b)
½
c)
¼
d)
0
21.
Which of the following cannot be the probability of an event?
a)
17⁄16
b)
0.1
c)
3%
d)
⅓
22.

Use the tree diagram to find the probability of tossing a head first and then a tail when a coin is tossed twice.

a)

1

b)

1/2

c)

1/4

d)

1/3

23.

A bag has 3 red marbles, 2 blue and 4 green and 1 yellow. What is the theoretical probability of pulling a red?

a)

3/10

b)

3/9

c)

1/9

d)

1/3

24.
You flip a coin 20 times and record the results. Is this experimental or theoretical probability?
a)
Experimental
b)
Theoretical
25.
What is the probability of choosing the letter
i from the word probability?
a)
1/10
b)
2/11
c)
2/2
d)
1/10

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