SOLUTION: the results of a survey of people`s main source of news are shown below. There are 200 respondents between ages of 36 to 50 years and 200 respondents who where over age 50. of the

Algebra ->  Probability-and-statistics -> SOLUTION: the results of a survey of people`s main source of news are shown below. There are 200 respondents between ages of 36 to 50 years and 200 respondents who where over age 50. of the       Log On


   

Question 898815: the results of a survey of people`s main source of news are shown below. There are 200 respondents between ages of 36 to 50 years and 200 respondents who where over age 50. of the 200 respondents who were between the ages of 36 and 50, 71 got their news primarily from newspapers. of the 200 respondents who were over age 50, 142 got their news primarily from newspapers.
1. what is the probability that an individual respondent got news primarily from newspapers?
2. what is the probability that an individual respondent got news primarily from newspapers and is over 50 years old?
3.given that a respondent gets news primarily from newspapers, what is the probability that he or she is over age 50?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

p(>50) = 142/200

p(36-50) = 71/200

1. P(one 0r the other) = (142 + 71)/400 = 213/400

2. P(NP and >50) = 142%2F400



P(A|B) = P(A and B)/P(B)

3. P(>50|NP) =  %28142%2F400%29%2F%28213%2F400%29+=+142%2F213