a.
To find: The
a.
Answer to Problem 1UA
The probability of winning the lottery next Tuesday and Wednesday is 0.000001.
Explanation of Solution
Given info:
A lottery has a three digit number from 000 to 999. Also, the number is 389.
Calculation:
Let
Here, the winning ticket on next Wednesday is not affected by winning ticket on next Tuesday. Thus, the selections are independent.
The formula for probability of event A is,
Substitute 1 for ‘Number of outcomes in event A’ and 1,000 for ‘Total number of outcomes in
The formula for probability of event B is,
Substitute 1 for ‘Number of outcomes in event B’ and 1,000 for ‘Total number of outcomes in sample space’,
Multiplication rule for Independent Events:
If the events A and B are independent the probability of occurring of event B is does not affected by event A, that is
The required probability is,
Therefore, the probability of winning next Tuesday and Wednesday is 0.000001.
Interpretation:
There is a 0.000001 probability of winning next Tuesday and Wednesday.
b.
To find: The probability of winning on Wednesday.
b.
Answer to Problem 1UA
The probability of winning on Wednesday is 0.001.
Explanation of Solution
Given info:
Won on Tuesday.
Calculation:
Let event A denote the winning ticket on Tuesday and B be denote that winning ticket on Wednesday.
Here, the winning ticket on next Wednesday is not affected by winning ticket on next Tuesday. Thus, the selections are independent.
The formula for probability of event B is,
Substitute 1 for ‘Number of outcomes in event B’ and 1,000 for ‘Total number of outcomes in sample space’,
Thus, there is a 0.001 probability of winning on Wednesday given that you won on Tues day.
Interpretation:
There is a 0.001 probability of winning on Wednesday given that you won on Tues day.
c.
To find: The probability of winning on Wednesday.
c.
Answer to Problem 1UA
The probability of winning on Wednesday is 0.001.
Explanation of Solution
Given info:
Did not win on Tuesday.
Calculation:
Let event A denote the winning ticket on Tuesday and B be denote that winning ticket on Wednesday.
Here, the winning ticket on next Wednesday is not affected by winning ticket on next Tuesday. Thus, the selections are independent.
The formula for probability of event B is,
Substitute 1 for ‘Number of outcomes in event B’ and 1,000 for ‘Total number of outcomes in sample space’,
Thus, there is a 0.001 probability of winning on Wednesday given that you did not win on Tuesday.
Interpretation:
There is a 0.001 probability of winning on Wednesday given that you did not win on Tuesday.
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Chapter 3 Solutions
Elementary Statistics: Picturing the World (6th Edition)
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