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Conditional & Simple Probability

Total questions: 20

Worksheet time: 36mins

Name
Class
Date
1.
a)
.2855
b)
.6246
c)
.0922
d)
.3230
2.
What is the probability that a student does not play on a sports team? 
a)
.5
b)
.45
c)
.55
3.
What is the probability of choosing a Honda? 
a)
.5970
b)
.5373
c)
.4627
d)
.4030
4.
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
5.
What is the probability that the person picked will be a boy given they speak german? 
a)
.7273
b)
.4
c)
.16
d)
.22
6.
What is the probability that a female is chose given they like a Toyota? 
a)
.525
b)
.4627
c)
.6774
d)
.3143
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.
What is the probability that they speak French given they are a girl? 
a)
2.14
b)
.24
c)
.4
d)
.8571
10.
What statement does the shaded region represent
a)
A or B
b)
Not A
c)
A and B
d)
Not B
11.
a)

1/2, 50%

b)

1/3, 33.3%

c)

2/3, 66.7%

d)

1/5, 20%

12.
a)

0%

b)

100%

c)

2/3, 66.7%

d)

3/5, 60%

13.
a)

0%

b)

1/4, 25%

c)

1/2, 50%

d)

100%

14.

Consider the following table with information about all of the students taking Statistics at Happy High School.


Find P( Female | Part-time) =

a)

15/31

b)

43/71

c)

31/43

d)

15/43

15.
P(Sandals|Pants):
a)
4/20
b)
6/15
c)
1/2
d)
2/7
16.
P(Pizza|Senior):
a)
10/15
b)
4/5
c)
2/3
d)
10/5
17.

What is P(male given F)?

a)

53.8%

b)

7%

c)

13%

d)

26.9%

18.

What is P(Spanish given Girl)?

a)

30%

b)

60%

c)

50%

d)

15%

19.

Convert 73% to a decimal

a)

73.0

b)

0.37

c)

0.73

d)

0.7

20.

Convert 3/4 to percent

a)

75%

b)

25%

c)

50%

d)

100%