Difference between revisions of "2004 AMC 8 Problems/Problem 2"
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Revision as of 23:20, 11 March 2012
Problem
How many different four-digit numbers can be formed be rearranging the four digits in ?
Solution
Note that the four-digit number must start with either a or a . The four-digit numbers that start with are , and . The four-digit numbers that start with are , and which gives us a total of