We have not included the solutions to the following examples in the summary pages.
Question
Consider a raffle of 100 tickets in which Anne Brown bought seven tickets. Tony Ng also bought four of these 100 tickets. What is the probability that either Anne or Tony win?
(Solved in full version)
The next example is based on a real data set.
Question
The following contingency table describes all 121,690 couples who were married in Australia in 2011.
Previous marital status of couple | Both partners born in Australia |
Both partners born in same overseas country |
Born partners in different countries |
---|---|---|---|
First marriage both partners | 51,663 | 10,522 | 24,630 |
First marriage one partner | 9,450 | 2,910 | 8,050 |
Remarriage both partners | 6,769 | 1,889 | 5,807 |
In a randomly selected marriage from 2011, what is the probability that either it was the first marriage of both partners or that both partners were born in Australia?
(Solved in full version)