According to the Internal Revenue Service (IRS), the chances of
your tax return being audited are about 6 in 1,000 if your income
is less than $50,000; 10 in 1,000 if your income is between $50,000
and $99,999; and 49 in 1,000 if your income is $100,000 or more
(Statistical Abstract of the United States: 1995).
If two taxpayers with incomes under $50,000 are randomly
selected and two with incomes more than $100,000 are randomly
selected, what is the probability...