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5.5: Probability with Two-Way Tables

Total questions: 16

Worksheet time: 4hrs 0mins

Name
Class
Date
1.

What is the probability that a randomly selected student is in 7th grade? Round to the nearest percent.

a)

26%

b)

14%

c)

16%

d)

47%

2.

What is the probability that a randomly selected student is a girl? Round to the nearest percent.

a)

45%

b)

30%

c)

46%

d)

54%

3.

What is the probability that a randomly selected student is an 8th grade boy? Round to the nearest percent.

a)

2%

b)

44%

c)

46%

d)

20%

4.

What is the probability that a randomly selected student is a 7th grade girl? Round to the nearest percent.

a)

54%

b)

14%

c)

26%

d)

32%

5.

What is the probability that a randomly selected student is a 6th grader given that they are a girl? Round to the nearest percent.

a)

8%

b)

16%

c)

30%

d)

53%

6.

What is the probability that a randomly selected student is a boy given that they are in 7th grade? Round to the nearest percent.

a)

12%

b)

6%

c)

26%

d)

46%

7.

Given that a randomly selected student is a boy, what is the probability that they are in 7th grade? Round to the nearest percent.

a)

12%

b)

6%

c)

26%

d)

46%

8.

Given that a randomly selected student is a 7th grader, what is the probability that they are a girl? Round to the nearest percent

a)

54%

b)

26%

c)

14%

d)

36%

9.

What is the probability that a randomly selected politician is a republican? Round to the nearest percent.

a)

46%

b)

54%

c)

50%

d)

99%

10.

What is the probability that a randomly selected politician is a democrat that supports the issue? Round to the nearest percent.

a)

2%

b)

20%

c)

24%

d)

50%

11.

What is the probability that a randomly selected politician is a republican that does not support the issue? Round to the nearest percent.

a)

28%

b)

55%

c)

48%

d)

33%

12.

What is the probability that a randomly selected politician is a republican given that they do not support the issue? Round to the nearest percent.

a)

28%

b)

55%

c)

48%

d)

33%

13.

What is the probability that a randomly selected politician does not support the issue given that they are republican? Round to the nearest percent.

a)

28%

b)

55%

c)

48%

d)

33%

14.

What is the probability that a randomly selected politician does not support the issue given that they are democrat? Round to the nearest percent.

a)

30%

b)

60%

c)

57%

d)

18%

15.

Given that a randomly selected politician supports the issue, what is the probability that they are democrat? Round to the nearest percent.

a)

20%

b)

50%

c)

40%

d)

47%

16.

Given that a randomly selected politician does support the issue, what is the probability that they are republican? Round to the nearest percent.

a)

53%

b)

27%

c)

23%

d)

45%