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Homework Assignment Regarding Probability Addition Rule The following table summarizes results from a study of people...

Homework Assignment Regarding Probability Addition Rule

The following table summarizes results from a study of people who refused to answer survey questions.

Age Group

18-21

22-29

30-39

40-49

50-59

60 and over

Responded

73

255

245

136

138

202

Refused

11

20

33

16

27

49

  1. What is the probability that the selected person refused to answer or is in the 40-49 age bracket?

  1. What is the probability that the selected person responded or is in the 18-21 age bracket?

  1. What is the probability that the selected person refused to respond or is in the 30-49 age bracket?

  1.   What is the probability that the selected person responded or is in the age bracket of 22-39?
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Answer #1

given that

Age group 18-21 22-29 30-39 40-49 50-59 60 and over total
Responded 73 255 245 136 138 202 1049
Refused 11 20 33 16 27 49 156
Total 84 275 278 152 165 251 1205

let R is event that person refused to respond

A is event that person responded

1)

now

2)

3)

4)

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